Widen Scope (promote to field)

• Aug 03, 2020
• 2 minutes to read

Purpose

Converts a variable declared within a method to a private field.

Availability

Available on a variable declaration within a method.

Usage

1. Place the caret on a variable declaration.

   NOTE

   The blinking cursor shows the caret's position at which the Refactoring is available.

   C#

   class TestClass {
       private void SetUrl(string url) {
           string │completeUrl = string.Format("http://{0}", url);
       }
   }
   

   VB.NET

   Public Class TestClass
       Private Sub SetUrl(url As String)
           Dim │completeUrl As String = String.Format("http://{0}", url)
       End Sub
   End Class
   

2. Use the Ctrl + . or Ctrl + ~ shortcut to invoke the Code Actions Menu.
3. Select Widen Scope (promote to field) from the menu.

After execution, the Refactoring moves the variable declaration out of the current methods and converts it to a field.

C#

class TestClass {
    string completeUrl;
    private void SetUrl(string url) {
        completeUrl = string.Format("http://{0}", url);
    }
}

VB.NET

Public Class TestClass
  Dim _completeUrl As String
  Private Sub SetUrl(url As String)
    _completeUrl = String.Format("http://{0}", url)
  End Sub
End Class

NOTE

The default visibility modifier of the generated member is configured on the Editor | <Language> | Scope Options options page. Refer to the Scope topic for details.