Managed API: Refactoring and formatting.

Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>

src/api/dotnet/ArithSort.cs

@@ -0,0 +1,34 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    ArithSort.cs
+
+Abstract:
+
+    Z3 Managed API: Arith Sorts
+
+Author:
+
+    Christoph Wintersteiger (cwinter) 2012-11-23
+
+Notes:
+    
+--*/
+
+using System;
+using System.Diagnostics.Contracts;
+
+namespace Microsoft.Z3
+{
+    /// <summary>
+    /// An arithmetic sort, i.e., Int or Real.
+    /// </summary>
+    public class ArithSort : Sort
+    {
+        #region Internal
+        internal ArithSort(Context ctx, IntPtr obj) : base(ctx, obj) { Contract.Requires(ctx != null); }
+        #endregion
+    };
+}