[REEF-1662] Update Snapshot Number to 06

JIRA:
  [REEF-1662](https://issues.apache.org/jira/browse/REEF-1662)

Pull request:
  This closes #1177
diff --git a/lang/cs/build.props b/lang/cs/build.props
index 4df8d96..f00867d 100644
--- a/lang/cs/build.props
+++ b/lang/cs/build.props
@@ -59,7 +59,7 @@
   <!-- REEF NuGet properties -->
   <PropertyGroup>
     <IsSnapshot>true</IsSnapshot>
-    <SnapshotNumber>05</SnapshotNumber>
+    <SnapshotNumber>06</SnapshotNumber>
     <PushPackages>false</PushPackages>
     <NuGetRepository>https://www.nuget.org</NuGetRepository>
     <NuGetError>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</NuGetError>