Declare Interface

• Aug 03, 2020
• 2 minutes to read

Purpose

Generates an interface for reference to a non-existent type and adds the interface members referenced from the initial code to it. The interface is declared in a new source code file.

Availability

Available on the name of an interface if it does not exist.

Usage

1. Place the caret on a reference to non-existent interface.

   NOTE

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

   • C#
   • VB.NET

   //Filename: Program.cs
   class Program {
       static void Main() {
           IPerson│ Andrew = new Customer("Andrew", "Fuller");
           Andrew.Age = 47;
           Andrew.SaveToDB();
       }
   }
   

2. Use the Ctrl + . or Ctrl + ~ shortcut to invoke the Code Actions Menu.

3. Select Declare | Declare Interface from the menu.

After execution, the Code Provider adds a new file to the project and declares the interface in it.

//Filename: IPerson.cs
public interface IPerson {
    void SaveToDB();
    int Age { get; set; }
}

'Filename: IPerson.vb
Public Interface IPerson
    Sub SaveToDB()
    Property Age() As Integer
End Interface