Everything in the same project

- Build in intrinsic commands as part of dotnet

src/dotnet/commands/dotnet-compile-native/RuntimeExtensions.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Runtime.InteropServices;
+using System.IO;
+
+using Microsoft.Dnx.Runtime.Common.CommandLine;
+using Microsoft.DotNet.Cli.Utils;
+using Microsoft.DotNet.Tools.Common;
+
+namespace Microsoft.DotNet.Tools.Compiler.Native
+{
+    static class RuntimeExtensions
+    {
+        internal static ArchitectureMode GetCurrentArchitecture()
+        {
+#if NET451 
+            return Environment.Is64BitProcess ? ArchitectureMode.x64 : ArchitectureMode.x86; 
+#else 
+            return IntPtr.Size == 8 ? ArchitectureMode.x64 : ArchitectureMode.x86; 
+#endif
+        }
+
+    }
+}