C# Extract Interface

This extension allows C# developers to quickly extract interfaces from C# classes. It provides a context menu option to generate an interface containing all the public method signatures of a class. The interface is created in the same directory as the class file, and the class definition is updated to implement the newly generated interface.

Features

• Extract interfaces from C# classes.
• Automatically generate the interface in the same directory as the class.
• Update the class to implement the newly created interface.
• Option to provide a custom name for the interface.

Usage

Context Menu Option

1. Open a C# file in VS Code.
2. Press Ctrl + . on a class keyword (place the cursor on it).
3. In the context menu, select "Extract Interface".
4. Enter a name for the new interface (default is I followed by the class name).
5. The extension will:
   • Generate an interface with all public methods of the class.
   • Create the interface in the same directory as the class.
   • Modify the class to implement the new interface.

Example

Given a class like this:

public class DiceManager
{
    public void RollDice() { }
    public int GetScore() { return 0; }
}

After clicking on "Extract Interface", it will generate the following interface:

public interface IDiceManager
{
    void RollDice();
    int GetScore();
}

The DiceManager class will be updated to:

public class DiceManager : IDiceManager
{
    public void RollDice() { }
    public int GetScore() { return 0; }
}

Troubleshooting

I don't see the "Extract Interface" option in the context menu.

Make sure you're pressing Ctrl + . on the class declaration (public class <ClassName>) in the editor. If you are on a method or variable, the option won't appear.

If Ctrl + . doesn't work, try right-clicking on the class declaration and selecting "Extract Interface" from the context menu.

The generated interface is not updating the class.

Ensure that the class is being correctly identified by the extension. If the class is not in the format public class <ClassName>, or if it's in a file that doesn't follow standard C# conventions, the extension may not function as expected.