Refactor C# code and support building nuget packages for cross-platforms (#144)

dotnet-examples/.editorconfig

@@ -0,0 +1,13 @@
+# top-most EditorConfig file
+root = true
+
+# Don't use tabs for indentation.
+[*]
+indent_style = space
+
+# Code files
+[*.{cs,csx,vb,vbx}]
+indent_size = 2
+insert_final_newline = true
+charset = utf-8-bom
+end_of_line = crlf