Convert Static to Extension Method refactoring

This refactoring helps you convert a static method to an extension method, provided that the static method:

• Has at least one parameter.

• Resides in a non-generic, non-nested static class.

Consider the following example:

static class Foo
{
  public static string Reverse(string input)
  {
    var chars = input.ToCharArray();
    Array.Reverse(chars);
    return new string(chars);
  }
  static void Test(string str)
  {
    str = Reverse(str);
  }
}

static class Foo
{
  public static string Reverse(this string input)
  {
    var chars = input.ToCharArray();
    Array.Reverse(chars);
    return new string(chars);
  }
  static void Test(string str)
  {
    str = str.Reverse();
  }
}

tip

The reverse functionality is available with the Convert Extension Method to Plain Static refactoring refactoring.

This feature is supported in the following languages and technologies:

The instructions and examples given here address the use of the feature in C#. For details specific to other languages, see corresponding topics in the ReSharper by language section.