Fix useragent issue

Author: mwatson

Src/StackifyLib/Utils/HttpClient.cs

@@ -581,11 +581,16 @@ private HttpWebRequest BuildJsonRequest(string url, string jsonData, bool compre
 #endif
             }
 
-            var request = (HttpWebRequest)WebRequest.Create(url);
+            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
+
+#if NET45 || NET40
+            request.UserAgent = "StackifyLib-" + _version;
+#else
+            request.Headers[HttpRequestHeader.UserAgent] = "StackifyLib-" + _version;
+#endif
 
             request.Headers["X-Stackify-Key"] = this.APIKey;
             request.ContentType = "application/json";
-            request.Headers[HttpRequestHeader.UserAgent] = "StackifyLib-" + _version;
 
             //if (HttpClient.CustomWebProxy != null)
             //{
@@ -657,7 +662,12 @@ private HttpWebRequest BuildPOSTRequest(string url, string postdata)
 
             request.Headers["X-Stackify-Key"] = this.APIKey;
             request.ContentType = "application/x-www-form-urlencoded";
+
+#if NET45 || NET40
+            request.UserAgent = "StackifyLib-" + _version;
+#else
             request.Headers[HttpRequestHeader.UserAgent] = "StackifyLib-" + _version;
+#endif
 
             //if (HttpClient.CustomWebProxy != null)
             //{

Src/StackifyLib/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.23.1-beta2",
+  "version": "1.23.1-beta3",
 
   "title":  "Stackify API",