From a1d03935138d7cf02cebf03591d9cadc55516632 Mon Sep 17 00:00:00 2001
From: Vance Morrison <vancem@microsoft.com>
Date: Tue, 14 Jun 2016 17:24:31 -0700
Subject: [PATCH] The contract class is only needed when building for V3.5
 runtimes.   #ifdef it out

---
 src/Zip/Contract.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Zip/Contract.cs b/src/Zip/Contract.cs
index 2e96898..cb7eb2b 100644
--- a/src/Zip/Contract.cs
+++ b/src/Zip/Contract.cs
@@ -1,4 +1,8 @@
-using System;
+// If you are compiling for a .NET Runtime before V4.0 than you need to provide these stubs that 
+// define the Contract class.   
+#if PRE_V4_0
+
+using System;
 
 namespace System.Diagnostics.Contracts
 {
@@ -34,3 +38,5 @@ namespace System.Diagnostics.Contracts
 
 	}
 }
+
+#endif
\ No newline at end of file