Converting existing code to use nameof() in C# 6

Now with the new C#6 nameof operator, the use of ArgumentNullExceptions and ArgumentExceptions become more flexible and resistant to variable refactoring and renaming.

ArgumentNullException

Here's a regex to search and replace in Visual Studio usage of ArgumentNullException: Search for:

throw new ArgumentNullException("(?<message>.*?)

Replace with:

throw new ArgumentNullException(nameof(${varname})

For example this will replace this

throw new ArgumentNullException("variable", "This variable cannot be null.");

with

throw new ArgumentNullException(nameof(variable), "This variable cannot be null.");

ArgumentException

Here's another regex to search and replace usage of ArgumentException: Search for:

throw new ArgumentException\("(?<message>.*?)", "(?<varname>.*?)"

Replace with:

throw new ArgumentException("${message}", nameof(${varname})

For example this will replace this

throw new ArgumentException("This argument is invalid for some weird reason.", "variable");

with

throw new ArgumentException("This argument is invalid for some weird reason.", nameof(variable));