Add support for deserializing JSON to subclasses of List<T>. Closes pull

request #236.

Author: petejohanson

RestSharp.Tests/JsonTests.cs

@@ -193,6 +193,16 @@ public void Can_Deserialize_Root_Json_Array_To_List()
 			Assert.Equal(4, output.Count);
 		}
 
+		[Fact]
+		public void Can_Deserialize_Root_Json_Array_To_Inherited_List()
+		{
+			var data = File.ReadAllText(Path.Combine("SampleData", "jsonarray.txt"));
+			var response = new RestResponse { Content = data };
+			var json = new JsonDeserializer();
+			var output = json.Deserialize<StatusList>(response);
+			Assert.Equal(4, output.Count);
+		}
+
 		[Fact]
 		public void Can_Deserialize_Various_Enum_Values ()
 		{

RestSharp.Tests/SampleClasses/twitter.cs

@@ -53,4 +53,8 @@ public class user
 		public int utc_offset { get; set; }
 
 	}
+
+	public class StatusList : List<status>
+	{
+	}
 }

RestSharp/Deserializers/JsonDeserializer.cs

@@ -198,7 +198,8 @@ private IDictionary BuildDictionary(Type type, object parent)
 		private IList BuildList(Type type, object parent)
 		{
 			var list = (IList)Activator.CreateInstance(type);
-			var itemType = type.GetGenericArguments()[0];
+			var listType = type.GetInterfaces().First(x => x.GetGenericTypeDefinition() == typeof(IList<>));
+			var itemType = listType.GetGenericArguments()[0];
 
 			if (parent is IList) {
 				foreach (var element in (IList)parent) {