diff --git a/MathEx.sln b/MathEx.sln
index e753972..07f213b 100644
--- a/MathEx.sln
+++ b/MathEx.sln
@@ -5,6 +5,8 @@ VisualStudioVersion = 15.0.26403.7
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MathEx", "MathEx\MathEx.csproj", "{FE22BB43-5C91-451E-8E5C-08D02AA4B080}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MathExExample", "MathExExample\MathExExample.csproj", "{14B091F4-F22E-43EE-B6AE-1453DB9AE246}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{FE22BB43-5C91-451E-8E5C-08D02AA4B080}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{FE22BB43-5C91-451E-8E5C-08D02AA4B080}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{FE22BB43-5C91-451E-8E5C-08D02AA4B080}.Release|Any CPU.Build.0 = Release|Any CPU
+		{14B091F4-F22E-43EE-B6AE-1453DB9AE246}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{14B091F4-F22E-43EE-B6AE-1453DB9AE246}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{14B091F4-F22E-43EE-B6AE-1453DB9AE246}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{14B091F4-F22E-43EE-B6AE-1453DB9AE246}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/MathEx/Class1.cs b/MathEx/Class1.cs
deleted file mode 100644
index 849a9a6..0000000
--- a/MathEx/Class1.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace MathEx
-{
-    public class Class1
-    {
-    }
-}
diff --git a/MathEx/MathEx.cs b/MathEx/MathEx.cs
new file mode 100644
index 0000000..1ab06ab
--- /dev/null
+++ b/MathEx/MathEx.cs
@@ -0,0 +1,55 @@
+using System;
+
+namespace MathExtention
+{
+    public static class MathEx
+    {
+		/// <summary>
+		/// Round Number by Custom Interval
+		/// </summary>
+		/// <param name="d0">Primitive</param>
+		/// <param name="di">Interval</param>
+		/// <returns></returns>
+		public static double RoundEx(double d0, double di)
+		{
+			di = 1 / di;
+			return Math.Round(d0 * di) / di;
+		}
+
+		/// <summary>
+		/// Round Number by Custom Interval
+		/// </summary>
+		/// <param name="d0">Primitive</param>
+		/// <param name="di">Interval</param>
+		/// <returns></returns>
+		public static decimal RoundEx(decimal d0, decimal di)
+		{
+			di = 1 / di;
+			return Math.Round(d0 * di) / di;
+		}
+
+		/// <summary>
+		/// Ceiling Number by Custom Interval
+		/// </summary>
+		/// <param name="d0">Primitive</param>
+		/// <param name="di">Interval</param>
+		/// <returns></returns>
+		public static double CeilingEx(double d0, double di)
+		{
+			di = 1 / di;
+			return (d0 > 0 ? Math.Ceiling(d0 * di) : Math.Floor(d0 * di)) / di;
+		}
+
+		/// <summary>
+		/// Ceiling Number by Custom Interval
+		/// </summary>
+		/// <param name="d0">Primitive</param>
+		/// <param name="di">Interval</param>
+		/// <returns></returns>
+		public static decimal CeilingEx(decimal d0, decimal di)
+		{
+			di = 1 / di;
+			return (d0 > 0 ? Math.Ceiling(d0 * di) : Math.Floor(d0 * di)) / di;
+		}
+	}
+}
diff --git a/MathEx/MathEx.csproj b/MathEx/MathEx.csproj
index 15b7c3f..09f3651 100644
--- a/MathEx/MathEx.csproj
+++ b/MathEx/MathEx.csproj
@@ -1,10 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>fe22bb43-5c91-451e-8e5c-08d02aa4b080</ProjectGuid>
+    <ProjectGuid>{FE22BB43-5C91-451E-8E5C-08D02AA4B080}</ProjectGuid>
     <OutputType>Library</OutputType>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>MathEx</RootNamespace>
@@ -30,24 +30,15 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="System"/>
-    
-    <Reference Include="System.Core"/>
-    <Reference Include="System.Xml.Linq"/>
-    <Reference Include="System.Data.DataSetExtensions"/>
-    
-    
-    <Reference Include="Microsoft.CSharp"/>
-    
-    <Reference Include="System.Data"/>
-    
-    <Reference Include="System.Net.Http"/>
-    
-    <Reference Include="System.Xml"/>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="Class1.cs" />
+    <Compile Include="MathEx.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
- </Project>
+</Project>
\ No newline at end of file
diff --git a/MathExExample/App.config b/MathExExample/App.config
new file mode 100644
index 0000000..88fa402
--- /dev/null
+++ b/MathExExample/App.config
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+    </startup>
+</configuration>
\ No newline at end of file
diff --git a/MathExExample/Form1.Designer.cs b/MathExExample/Form1.Designer.cs
new file mode 100644
index 0000000..198d580
--- /dev/null
+++ b/MathExExample/Form1.Designer.cs
@@ -0,0 +1,153 @@
+namespace MathExExample
+{
+	partial class Form1
+	{
+		/// <summary>
+		/// Required designer variable.
+		/// </summary>
+		private System.ComponentModel.IContainer components = null;
+
+		/// <summary>
+		/// Clean up any resources being used.
+		/// </summary>
+		/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && (components != null))
+			{
+				components.Dispose();
+			}
+			base.Dispose(disposing);
+		}
+
+		#region Windows Form Designer generated code
+
+		/// <summary>
+		/// Required method for Designer support - do not modify
+		/// the contents of this method with the code editor.
+		/// </summary>
+		private void InitializeComponent()
+		{
+			this.numPrimitive = new System.Windows.Forms.NumericUpDown();
+			this.numInterval = new System.Windows.Forms.NumericUpDown();
+			this.lblInterval = new System.Windows.Forms.Label();
+			this.lblResult = new System.Windows.Forms.Label();
+			this.numResult = new System.Windows.Forms.NumericUpDown();
+			((System.ComponentModel.ISupportInitialize)(this.numPrimitive)).BeginInit();
+			((System.ComponentModel.ISupportInitialize)(this.numInterval)).BeginInit();
+			((System.ComponentModel.ISupportInitialize)(this.numResult)).BeginInit();
+			this.SuspendLayout();
+			// 
+			// numPrimitive
+			// 
+			this.numPrimitive.DecimalPlaces = 2;
+			this.numPrimitive.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
+			this.numPrimitive.Increment = new decimal(new int[] {
+            5,
+            0,
+            0,
+            131072});
+			this.numPrimitive.Location = new System.Drawing.Point(91, 13);
+			this.numPrimitive.Maximum = new decimal(new int[] {
+            1000,
+            0,
+            0,
+            0});
+			this.numPrimitive.Name = "numPrimitive";
+			this.numPrimitive.Size = new System.Drawing.Size(90, 29);
+			this.numPrimitive.TabIndex = 1;
+			this.numPrimitive.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
+			this.numPrimitive.ValueChanged += new System.EventHandler(this.num_ValueChanged);
+			// 
+			// numInterval
+			// 
+			this.numInterval.DecimalPlaces = 2;
+			this.numInterval.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
+			this.numInterval.Increment = new decimal(new int[] {
+            5,
+            0,
+            0,
+            131072});
+			this.numInterval.Location = new System.Drawing.Point(90, 48);
+			this.numInterval.Maximum = new decimal(new int[] {
+            1000,
+            0,
+            0,
+            0});
+			this.numInterval.Name = "numInterval";
+			this.numInterval.Size = new System.Drawing.Size(90, 29);
+			this.numInterval.TabIndex = 2;
+			this.numInterval.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
+			this.numInterval.ValueChanged += new System.EventHandler(this.num_ValueChanged);
+			// 
+			// lblInterval
+			// 
+			this.lblInterval.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
+			this.lblInterval.Location = new System.Drawing.Point(12, 48);
+			this.lblInterval.Name = "lblInterval";
+			this.lblInterval.Size = new System.Drawing.Size(72, 29);
+			this.lblInterval.TabIndex = 1;
+			this.lblInterval.Text = "Interval";
+			this.lblInterval.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
+			// 
+			// lblResult
+			// 
+			this.lblResult.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
+			this.lblResult.Location = new System.Drawing.Point(12, 80);
+			this.lblResult.Name = "lblResult";
+			this.lblResult.Size = new System.Drawing.Size(72, 29);
+			this.lblResult.TabIndex = 1;
+			this.lblResult.Text = "Result";
+			this.lblResult.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
+			// 
+			// numResult
+			// 
+			this.numResult.DecimalPlaces = 2;
+			this.numResult.Enabled = false;
+			this.numResult.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
+			this.numResult.Increment = new decimal(new int[] {
+            5,
+            0,
+            0,
+            131072});
+			this.numResult.Location = new System.Drawing.Point(90, 83);
+			this.numResult.Maximum = new decimal(new int[] {
+            1000,
+            0,
+            0,
+            0});
+			this.numResult.Name = "numResult";
+			this.numResult.ReadOnly = true;
+			this.numResult.Size = new System.Drawing.Size(90, 29);
+			this.numResult.TabIndex = 0;
+			this.numResult.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
+			// 
+			// Form1
+			// 
+			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+			this.ClientSize = new System.Drawing.Size(194, 128);
+			this.Controls.Add(this.lblResult);
+			this.Controls.Add(this.lblInterval);
+			this.Controls.Add(this.numResult);
+			this.Controls.Add(this.numInterval);
+			this.Controls.Add(this.numPrimitive);
+			this.Name = "Form1";
+			this.Text = "MathEx";
+			((System.ComponentModel.ISupportInitialize)(this.numPrimitive)).EndInit();
+			((System.ComponentModel.ISupportInitialize)(this.numInterval)).EndInit();
+			((System.ComponentModel.ISupportInitialize)(this.numResult)).EndInit();
+			this.ResumeLayout(false);
+
+		}
+
+		#endregion
+
+		private System.Windows.Forms.NumericUpDown numPrimitive;
+		private System.Windows.Forms.NumericUpDown numInterval;
+		private System.Windows.Forms.Label lblInterval;
+		private System.Windows.Forms.Label lblResult;
+		private System.Windows.Forms.NumericUpDown numResult;
+	}
+}
+
diff --git a/MathExExample/Form1.cs b/MathExExample/Form1.cs
new file mode 100644
index 0000000..49567a7
--- /dev/null
+++ b/MathExExample/Form1.cs
@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using MathExtention;
+
+namespace MathExExample
+{
+	public partial class Form1 : Form
+	{
+		public Form1()
+		{
+			InitializeComponent();
+			this.numPrimitive.Value = 285.30m;
+			this.numInterval.Value = 2.5m;
+		}
+
+		private void num_ValueChanged(object sender, EventArgs e)
+		{
+			if (this.numInterval.Value != 0)
+			{
+				this.numResult.Value = MathEx.RoundEx(this.numPrimitive.Value, this.numInterval.Value);
+				this.numPrimitive.Focus();
+			}
+		}
+	}
+}
diff --git a/MathExExample/Form1.resx b/MathExExample/Form1.resx
new file mode 100644
index 0000000..1af7de1
--- /dev/null
+++ b/MathExExample/Form1.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/MathExExample/MathExExample.csproj b/MathExExample/MathExExample.csproj
new file mode 100644
index 0000000..976a356
--- /dev/null
+++ b/MathExExample/MathExExample.csproj
@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{14B091F4-F22E-43EE-B6AE-1453DB9AE246}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>MathExExample</RootNamespace>
+    <AssemblyName>MathExExample</AssemblyName>
+    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Deployment" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Form1.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Form1.Designer.cs">
+      <DependentUpon>Form1.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <EmbeddedResource Include="Form1.resx">
+      <DependentUpon>Form1.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\MathEx\MathEx.csproj">
+      <Project>{fe22bb43-5c91-451e-8e5c-08d02aa4b080}</Project>
+      <Name>MathEx</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/MathExExample/Program.cs b/MathExExample/Program.cs
new file mode 100644
index 0000000..7d487bf
--- /dev/null
+++ b/MathExExample/Program.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace MathExExample
+{
+	static class Program
+	{
+		/// <summary>
+		/// The main entry point for the application.
+		/// </summary>
+		[STAThread]
+		static void Main()
+		{
+			Application.EnableVisualStyles();
+			Application.SetCompatibleTextRenderingDefault(false);
+			Application.Run(new Form1());
+		}
+	}
+}
diff --git a/MathExExample/Properties/AssemblyInfo.cs b/MathExExample/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..5638517
--- /dev/null
+++ b/MathExExample/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("MathExExample")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("MathExExample")]
+[assembly: AssemblyCopyright("Copyright ©  2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("14b091f4-f22e-43ee-b6ae-1453db9ae246")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/MathExExample/Properties/Resources.Designer.cs b/MathExExample/Properties/Resources.Designer.cs
new file mode 100644
index 0000000..9531b05
--- /dev/null
+++ b/MathExExample/Properties/Resources.Designer.cs
@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace MathExExample.Properties
+{
+
+
+	/// <summary>
+	///   A strongly-typed resource class, for looking up localized strings, etc.
+	/// </summary>
+	// This class was auto-generated by the StronglyTypedResourceBuilder
+	// class via a tool like ResGen or Visual Studio.
+	// To add or remove a member, edit your .ResX file then rerun ResGen
+	// with the /str option, or rebuild your VS project.
+	[global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+	[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+	[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+	internal class Resources
+	{
+
+		private static global::System.Resources.ResourceManager resourceMan;
+
+		private static global::System.Globalization.CultureInfo resourceCulture;
+
+		[global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		internal Resources()
+		{
+		}
+
+		/// <summary>
+		///   Returns the cached ResourceManager instance used by this class.
+		/// </summary>
+		[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+		internal static global::System.Resources.ResourceManager ResourceManager
+		{
+			get
+			{
+				if ((resourceMan == null))
+				{
+					global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("MathExExample.Properties.Resources", typeof(Resources).Assembly);
+					resourceMan = temp;
+				}
+				return resourceMan;
+			}
+		}
+
+		/// <summary>
+		///   Overrides the current thread's CurrentUICulture property for all
+		///   resource lookups using this strongly typed resource class.
+		/// </summary>
+		[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+		internal static global::System.Globalization.CultureInfo Culture
+		{
+			get
+			{
+				return resourceCulture;
+			}
+			set
+			{
+				resourceCulture = value;
+			}
+		}
+	}
+}
diff --git a/MathExExample/Properties/Resources.resx b/MathExExample/Properties/Resources.resx
new file mode 100644
index 0000000..af7dbeb
--- /dev/null
+++ b/MathExExample/Properties/Resources.resx
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/MathExExample/Properties/Settings.Designer.cs b/MathExExample/Properties/Settings.Designer.cs
new file mode 100644
index 0000000..7a48ae3
--- /dev/null
+++ b/MathExExample/Properties/Settings.Designer.cs
@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace MathExExample.Properties
+{
+
+
+	[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+	[global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+	internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+	{
+
+		private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+
+		public static Settings Default
+		{
+			get
+			{
+				return defaultInstance;
+			}
+		}
+	}
+}
diff --git a/MathExExample/Properties/Settings.settings b/MathExExample/Properties/Settings.settings
new file mode 100644
index 0000000..3964565
--- /dev/null
+++ b/MathExExample/Properties/Settings.settings
@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>