C# Custom Exceptions
C# User-Defined Exceptions
C# allows us to create user-defined or custom exception. It is used to make the meaningful exception. To do this, we need to inherit Exception class.
C# user-defined exception example
using System;
public class InvalidAgeException : Exception
{
public InvalidAgeException(String message)
: base(message)
{
}
}
public class TestUserDefinedException
{
static void validate(int age)
{
if (age < 18)
{
throw new InvalidAgeException("Sorry, Age must be greater than 18");
}
}
public static void Main(string[] args)
{
try
{
validate(12);
}
catch (InvalidAgeException e) { Console.WriteLine(e); }
Console.WriteLine("Rest of the code");
}
}
public class InvalidAgeException : Exception
{
public InvalidAgeException(String message)
: base(message)
{
}
}
public class TestUserDefinedException
{
static void validate(int age)
{
if (age < 18)
{
throw new InvalidAgeException("Sorry, Age must be greater than 18");
}
}
public static void Main(string[] args)
{
try
{
validate(12);
}
catch (InvalidAgeException e) { Console.WriteLine(e); }
Console.WriteLine("Rest of the code");
}
}
Output:
InvalidAgeException: Sorry, Age must be greater than 18
Rest of the code
Rest of the code
