Fixed QueryInterfaceOrNull.

Author: jkoritzinsky

ComObject.cs

@@ -99,7 +99,8 @@ public static bool EqualsComObject<T>(T left, T right) where T : ComObject
         public virtual T QueryInterface<T>() where T : ComObject
         {
             IntPtr parentPtr;
-            this.QueryInterface(typeof(T).GetTypeInfo().GUID, out parentPtr);
+            var result = this.QueryInterface(typeof(T).GetTypeInfo().GUID, out parentPtr);
+            result.CheckError();
             return FromPointer<T>(parentPtr);
         }
 

Mapping.xml

@@ -25,7 +25,7 @@
   <assembly>SharpGen.Runtime.COM</assembly>
 
 
-  <sdk name="WindowsSdk" version="10.0.15063.0" />
+  <sdk name="WindowsSdk" version="10.0.16299.0" />
   <sdk name="StdLib" />
 
   <include-prolog>
@@ -161,6 +161,7 @@
     <context>Unknwnbase</context>
     <map interface="IUnknown" callback="true" callback-dual="true" callback-name="ComObject" callback-visibility="public" />
     <map method="IUnknown::.*" keep-implement-public="true" />
+    <map method="IUnknown::QueryInterface" check="false" />
     <context-clear/>
 
     <!-- Map IStream -->

NuGet.Config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+  </packageSources>
+</configuration>