Move .NET 45 Write/FlushAsync into new Net45PclExport

Author: mythz

src/ServiceStack.Text/PclExport.Net40.cs

@@ -691,6 +691,29 @@ public MacPclExport()
 	}
 #endif
 
+#if NET45 || NETFX_CORE
+    public class Net45PclExport : Net40PclExport
+    {
+        public static new Net45PclExport Provider = new IosPclExport();
+
+        public Net45PclExport()
+        {
+            PlatformName = "NET45 " + Environment.OSVersion.Platform.ToString();
+        }
+
+        public new static void Configure()
+        {
+            Configure(Provider);
+        }
+
+        public override Task WriteAndFlushAsync(Stream stream, byte[] bytes)
+        {
+            return stream.WriteAsync(bytes, 0, bytes.Length)
+                .ContinueWith(t => stream.FlushAsync());
+        }
+    }
+#endif
+
 #if __IOS__ || __MAC__
     [Preserve(AllMembers = true)]
     internal class Poco

src/ServiceStack.Text/PclExport.cs

@@ -46,6 +46,8 @@ public static PclExport Instance
           = new MacPclExport()
 #elif ANDROID
           = new AndroidPclExport()
+#elif NET45
+          = new Net45PclExport()
 #else
           = new Net40PclExport()
 #endif
@@ -485,14 +487,9 @@ public virtual string GetStackTrace()
 
         public virtual Task WriteAndFlushAsync(Stream stream, byte[] bytes)
         {
-#if !SL5
-            return stream.WriteAsync(bytes, 0, bytes.Length)
-                .ContinueWith(t => stream.FlushAsync());
-#else
             stream.Write(bytes, 0, bytes.Length);
             stream.Flush();
             return EmptyTask;
-#endif
         }
     }