Merge pull request #190 from AlexMcArdle/Fix-UserAgent

Use UserAgent instead of DefaultUserAgent

Author: CrustyJew

RedditSharp/WebAgent.cs

@@ -190,7 +190,7 @@ protected virtual HttpRequestMessage CreateRequest(Uri uri, string method)
 
             request.Method = new HttpMethod(method);
             //request.Headers.UserAgent.ParseAdd(UserAgent);
-            request.Headers.TryAddWithoutValidation("User-Agent", $"{DefaultUserAgent} - with RedditSharp by meepster23");
+            request.Headers.TryAddWithoutValidation("User-Agent", $"{UserAgent} - with RedditSharp by meepster23");
             return request;
         }