Added global props and config

Directory.Build.props

@@ -0,0 +1,7 @@
+<Project>
+    <PropertyGroup>
+        <BaseOutputPath>bin\$(MSBuildProjectName)\</BaseOutputPath>
+        <BaseIntermediateOutputPath>obj\$(MSBuildProjectName)\</BaseIntermediateOutputPath>
+        <MSBuildProjectExtensionsPath>obj\$(MSBuildProjectName)\</MSBuildProjectExtensionsPath>
+    </PropertyGroup>
+</Project>

global.json

@@ -0,0 +1,9 @@
+{
+  "sdk": {
+    "version": "6.0.201",
+    "rollForward": "latestPatch"
+  },
+  "msbuild-sdks": {
+    "Xamarin.Legacy.Sdk": "0.1.2-alpha6"
+  }
+}