Async

LanguageFeatures/Models/MyAsyncMethods.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace LanguageFeatures.Models
+{
+	public class MyAsyncMethods
+	{
+		public static Task<long?> GetPageLength()
+		{
+			HttpClient client = new HttpClient();
+			var httpTask = client.GetAsync("http://apress.com");
+
+			// another task while completing http request.
+
+			return httpTask.ContinueWith((Task<HttpResponseMessage> antecedent) =>
+			{
+				return antecedent.Result.Content.Headers.ContentLength;
+			});
+		}
+	}
+}