Move Stream.Close() ext method to SS.Text and add TaskUtils.Sleep()

Author: mythz

src/ServiceStack.Text/PclExport.Net40.cs

@@ -568,15 +568,6 @@ public override SetPropertyDelegate GetSetMethod(PropertyInfo propertyInfo, Fiel
                 : CreateIlFieldSetter(fieldInfo);
         }
 
-        public override Type UseType(Type type)
-        {
-            if (type.IsInterface || type.IsAbstract)
-            {
-                return DynamicProxy.GetInstanceFor(type).GetType();
-            }
-            return type;
-        }
-
         public override DataContractAttribute GetWeakDataContract(Type type)
         {
             return type.GetWeakDataContract();

src/ServiceStack.Text/StreamExtensions.cs

@@ -285,9 +285,10 @@ public static byte[] Combine(this byte[] bytes, params byte[][] withBytes)
             return to;
         }
 
-#if NETSTANDARD1_1
+#if PCL || NETSTANDARD1_1
         public static void Close(this Stream stream)
         {
+            PclExport.Instance?.CloseStream(stream);
             stream.Dispose();
         }
 #endif

src/ServiceStack.Text/TaskUtils.cs

@@ -147,5 +147,14 @@ static void StartNextIteration<T>(TaskCompletionSource<object> tcs,
             if (iterationTask != null)
                 iterationTask.ContinueWith(next, CancellationToken.None, TaskContinuationOptions.ExecuteSynchronously, TaskScheduler.Default);
         }
+
+        public static void Sleep(int timeMs)
+        {
+#if PCL || NETSTANDARD1_1
+            Task.Delay(timeMs).Wait();
+#else
+            Thread.Sleep(timeMs);
+#endif
+        }
     }
 }