Make Method Non-Static refactoring

note

This refactoring does not work for static properties because a property does not have any parameter to create an instance from.

This refactoring allows you to convert a static method into an instance method of the original or another type. The target type for the new instance method can be selected from one of the types passed as parameters to the method. All usages, implementations and overrides of the method are automatically updated.

This refactoring can only be applied to static methods that have at least one parameter of a type defined in the current solution.

tip

The reverse functionality is available with the Make Method/Property Static refactoring refactoring.

tip

Similar functionality for instance methods is available with the Move Instance Method refactoring.

In the example below, we use this refactoring to convert a static method Merge of the Info class into an instance method of the same type:

class Info
{
  string Id { get; set; }
  string Name { get; set; }
  static Info Merge(Info i1, Info i2)
  {
    return new Info
    {
      Id = i1.Id + i2.Id,
      Name = i1.Name + i2.Name
    };
  }
  void Test()
  {
    var i1 = new Info()
      { Id = "123", Name = "AA" };
    var i2 = new Info()
      { Id = "456", Name = "BB" };
    var merged =
      Info.Merge(i1, i2);
  }
}

class Info
{
  string Id { get; set; }
  string Name { get; set; }
  Info Merge(Info i2)
  {
    return new Info
    {
      Id = Id + i2.Id,
      Name = Name + i2.Name
    };
  }
  void Test()
  {
    var i1 = new Info()
      { Id = "123", Name = "AA" };
    var i2 = new Info()
      { Id = "456", Name = "BB" };
    var merged =
      i1.Merge(i2);
  }
}

In the following example, the static method Merge that works with Info objects is defined in the class Service. We use the refactoring to make Merge an instance method of the class Info, where it logically belongs:

class Service
{
  public static Info Merge(Info i1,
    Info i2)
  {
    return new Info
    {
      Id = i1.Id + i2.Id,
      Name = i1.Name + i2.Name
    };
  }
}
class Info
{
  public string Id { get; set; }
  public string Name { get; set; }
  void Test()
  {
    var info1 = new Info()
      { Id = "123", Name = "AA" };
    var info2 = new Info()
      { Id = "456", Name = "BB" };
    var merged =
      Service.Merge(info1, info2);
  }
}

class Service
{
}
class Info
{
  public string Id { get; set; }
  public string Name { get; set; }
  void Test()
  {
    var info1 = new Info()
      { Id = "123", Name = "AA" };
    var info2 = new Info()
      { Id = "456", Name = "BB" };
    var merged =
      info1.Merge(info2);
  }
  public Info Merge(Info i2)
  {
    return new Info
    {
      Id = Id + i2.Id,
      Name = Name + i2.Name
    };
  }
}

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.