Add Defer

Author: mythz

src/ServiceStack.Text/Defer.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace ServiceStack
+{
+    /// <summary>
+    /// Useful class for C# 8 using declaration to defer action til outside of scope, e.g:
+    /// using var defer = new Defer(() => response.Close());
+    /// </summary>
+    public struct Defer : IDisposable
+    {
+        private readonly Action fn;
+        public Defer(Action fn) => this.fn = fn ?? throw new ArgumentNullException(nameof(fn));
+        public void Dispose() => fn();
+    }
+}

tests/ServiceStack.Text.Tests/RuntimeSerializtionTests.cs renamed to tests/ServiceStack.Text.Tests/RuntimeSerializationTests.cs

@@ -57,7 +57,7 @@ public class RuntimeObjects
         public object[] Objects { get; set; }
     }
 
-    public class RuntimeSerializtionTests
+    public class RuntimeSerializationTests
     {
         string CreateJson(Type type) => CreateJson(type.AssemblyQualifiedName);
         string CreateJson(string typeInfo) => "{\"Object\":{\"__type\":\"" + typeInfo + "\"}}";