Ratelimit changes

CryptoExchange.Net/Objects/CallResult.cs

@@ -0,0 +1,24 @@
+namespace CryptoExchange.Net
+{
+    public class CallResult<T>
+    {
+        /// <summary>
+        /// The data returned by the call
+        /// </summary>
+        public T Data { get; internal set; }
+        /// <summary>
+        /// An error if the call didn't succeed
+        /// </summary>
+        public Error Error { get; internal set; }
+        /// <summary>
+        /// Whether the call was successful
+        /// </summary>
+        public bool Success => Error == null;
+
+        public CallResult(T data, Error error)
+        {
+            Data = data;
+            Error = error;
+        }
+    }
+}