Removed the code contracts /shit/.

Perspex/Contract.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Perspex
+{
+    internal static class Contract
+    {
+        public static void Requires<TException>(bool condition) where TException : Exception
+        {
+        }
+    }
+}

Perspex/ControlTemplate.cs

@@ -7,7 +7,6 @@
 namespace Perspex
 {
     using System;
-    using System.Diagnostics.Contracts;
     using System.Linq;
     using Perspex.Controls;
 

Perspex/Controls/Control.cs

@@ -9,7 +9,6 @@ namespace Perspex.Controls
     using System;
     using System.Collections.Generic;
     using System.Collections.ObjectModel;
-    using System.Diagnostics.Contracts;
     using System.Reactive.Linq;
     using Perspex.Input;
     using Perspex.Layout;

Perspex/Interactive.cs

@@ -8,7 +8,6 @@ namespace Perspex
 {
     using System;
     using System.Collections.Generic;
-    using System.Diagnostics.Contracts;
     using System.Reactive;
     using System.Reactive.Linq;
 

Perspex/Perspex.csproj

@@ -70,6 +70,7 @@
   <ItemGroup>
     <Compile Include="Application.cs" />
     <Compile Include="Classes.cs" />
+    <Compile Include="Contract.cs" />
     <Compile Include="Controls\Border.cs" />
     <Compile Include="Controls\Button.cs" />
     <Compile Include="Controls\ContentPresenter.cs" />

Perspex/PerspexObject.cs

@@ -8,7 +8,6 @@ namespace Perspex
 {
     using System;
     using System.Collections.Generic;
-    using System.Diagnostics.Contracts;
     using System.Linq;
     using System.Linq.Expressions;
     using System.Reactive;

Perspex/PerspexProperty.cs

@@ -8,7 +8,6 @@ namespace Perspex
 {
     using System;
     using System.Collections.Generic;
-    using System.Diagnostics.Contracts;
     using System.Linq;
     using System.Reflection;
     using System.Text;

Perspex/PriorityValue.cs

@@ -8,7 +8,6 @@ namespace Perspex
 {
     using System;
     using System.Collections.Generic;
-    using System.Diagnostics.Contracts;
     using System.Linq;
     using System.Reactive.Disposables;
 

Perspex/RoutedEvent.cs

@@ -7,7 +7,6 @@
 namespace Perspex
 {
     using System;
-    using System.Diagnostics.Contracts;
     using System.Reflection;
 
     public enum RoutingStrategy

Perspex/Setter.cs

@@ -8,7 +8,6 @@ namespace Perspex
 {
     using System;
     using System.Collections.Generic;
-    using System.Diagnostics.Contracts;
     using System.Reactive.Disposables;
     using Perspex.Controls;
 

Perspex/Styling/Activator.cs

@@ -8,7 +8,6 @@ namespace Perspex.Styling
 {
     using System;
     using System.Collections.Generic;
-    using System.Diagnostics.Contracts;
     using System.Linq;
     using System.Reactive.Disposables;
 

Perspex/Styling/Selectors.cs

@@ -7,7 +7,6 @@
 namespace Perspex.Styling
 {
     using System;
-    using System.Diagnostics.Contracts;
     using System.Reactive.Linq;
     using Perspex.Controls;
 

Perspex/Thickness.cs

@@ -7,7 +7,6 @@
 namespace Perspex
 {
     using System;
-    using System.Diagnostics.Contracts;
 
     public struct Thickness
     {

Perspex/Visual.cs

@@ -8,7 +8,6 @@ namespace Perspex
 {
     using System;
     using System.Collections.Generic;
-    using System.Diagnostics.Contracts;
     using System.Linq;
     using Perspex.Controls;
     using Perspex.Media;

Perspex/VisualExtensions.cs

@@ -7,7 +7,6 @@
 namespace Perspex
 {
     using System;
-    using System.Diagnostics.Contracts;
     using System.Linq;
 
     public static class VisualExtensions