How to create your own exception class in your project?

In C#, to create a custom exception class, inherit from the base class Exception or one of its descendants. Usually, constructors are overridden for convenience.

Example:

using System;

public class MyCustomException : Exception
{
    public MyCustomException() { }

    public MyCustomException(string message) : base(message) { }

    public MyCustomException(string message, Exception inner) : base(message, inner) { }
}

Such a class can be used to throw and handle specific errors in your project.