Remove Unused Parameter

• Aug 19, 2021
• 2 minutes to read

Purpose

Removes a method parameter if it is never referenced in the method body code.

Note

Remove Unused Parameter is a cascading Refactoring. That means that the Refactoring affects all method calls and method declarations in interfaces, base and descendant classes.

Availability

Available in the following cases:

• When the cursor is on a method parameter that is never used.
• When the cursor is on a method name. This method has one or more parameters that are never used.

How to Use

1. Place the caret on an unused method parameter (for example, in the “param1”).

   C#

   private string TestMethod(string param1, int param2)
   {
       return String.Format("the param2 value is {0}", param2);
   }
   
   private void MyMethod()
   {
       string str = TestMethod("My string", 10);
   }
   

   VB.NET

   Private Function  TestMethod(ByVal param1 As String, ByVal param2 As Integer) As String
       Return String.Format("the param2 value is {0}", param2)
   End Function
   
   Private Sub MyMethod()
       Dim str As String = TestMethod("My string", 10)
   End Sub
   

2. Press the Ctrl + . or Ctrl + ~ shortcut to invoke the Code Actions menu.

   

3. Select Remove Unused Parameter: <parameter name> from the menu.

After execution, the Refactoring removes the unused parameter from the method signature.

C#

private string TestMethod(int param2)
{
    return String.Format("the param2 value is {0}", param2);
}
private void MyMethod()
{
    string str = TestMethod(10);
}

VB.NET

Private Function TestMethod(ByVal param2 As Integer) As String
    Return String.Format("the param2 value is {0}", param2)
End Function

Private Sub MyMethod()
    Dim str As String = TestMethod(10)
End Sub