[REEF-1781] Ensure REEF.NET builds on Windows 10 with only VS 2017 installed

   * Modified the bridge project file to use the 10.xx+ Windows SDK when the version of visual studio is greater than or equal to 15.0.
   * Updated the latest 10.0.15063 Windows 10 platform SDK.
   * Switched to using MSBuildAssemblyVersion for platform version decision.

JIRA: [REEF-1781](https://issues.apache.org/jira/browse/REEF-1781)

Closes #1297
diff --git a/lang/cs/Org.Apache.REEF.Bridge/Org.Apache.REEF.Bridge.vcxproj b/lang/cs/Org.Apache.REEF.Bridge/Org.Apache.REEF.Bridge.vcxproj
index 43e0776..ef98904 100644
--- a/lang/cs/Org.Apache.REEF.Bridge/Org.Apache.REEF.Bridge.vcxproj
+++ b/lang/cs/Org.Apache.REEF.Bridge/Org.Apache.REEF.Bridge.vcxproj
@@ -41,6 +41,7 @@
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <Keyword>ManagedCProj</Keyword>
     <RootNamespace>Org.Apache.REEF.Bridge</RootNamespace>
+    <WindowsTargetPlatformVersion Condition="'$(MSBuildAssemblyVersion)' >= '15.0'">10.0.15063.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <!--
@@ -202,4 +203,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>