Curriculum
In C#, custom exceptions can be defined by creating a new class that inherits from the Exception class or one of its derived classes. By creating custom exceptions, you can provide more specific information about errors that occur in your code and make your code more readable and maintainable.
Here is an example of a custom exception class in C#:
public class InvalidAgeException : Exception
{
public InvalidAgeException(string message) : base(message)
{
}
}
In this example, a custom exception class named InvalidAgeException is defined. This class inherits from the Exception class and has a single constructor that takes a string parameter. The constructor calls the base class constructor with the message parameter to initialize the Exception message property.
Now we can use this custom exception in our code:
public void CheckAge(int age)
{
if (age < 0)
{
throw new InvalidAgeException("Age cannot be negative.");
}
}
In this example, a method named CheckAge takes an age parameter and checks whether it is negative. If the age is negative, the method throws an InvalidAgeException with a message that explains the error.
By using custom exceptions, we can create more specific and meaningful error messages that make it easier to identify and troubleshoot issues in our code.
Rules for using custom exceptions in C#:
Overall, custom exceptions are a powerful feature of C# that can be used to improve the robustness and maintainability of software applications. By providing more specific and informative error messages, custom exceptions can help developers to identify and fix issues more quickly and effectively.