What are some examples of custom exceptions in C#?

Can you give me some examples of custom exceptions in C#?

Sure! In C#, you can create a custom exception by inheriting from the Exception class. For example, you might create a UserNotFoundException.

How would I implement the UserNotFoundException?

You can implement it like this:

public class UserNotFoundException : Exception
{
    public UserNotFoundException(string message) : base(message) {}
}

Can you show me how to throw this exception?

Certainly! You can throw the exception like this:

if (user == null)
{
    throw new UserNotFoundException("User not found in the database.");
}

What about catching this exception?

You can catch it using a try-catch block:

try
{
    // code that may throw the exception
}
catch (UserNotFoundException ex)
{
    Console.WriteLine(ex.Message);
}