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User Defined Exceptions in C#

C# User defined exceptions: In this tutorial, we are going to learn how to create user-defined exceptions in C# with examples?
Submitted by IncludeHelp, on September 21, 2019

C# User-defined exceptions

In C#, we can create our exception class by inheriting base class Exception. Because as we know that Exception is the base class for all types of exceptions in C#.

Here is the example of a user-defined exception,

using System;

class UserDefineException: Exception
{

    public UserDefineException(string str)
    {
        Console.WriteLine(str);
    }
}

class Program
{
    static void Main()
    {
        UserDefineException M = new UserDefineException("User Define Exception");

        try
        {
            throw M;
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }
}

Output

User Define Exception
Exception of type 'UserDefineException' was thrown. 

In the above program, we created a class "UserDefineException" by inheriting the base class "Exception" and created a parameterized constructor, through the user-defined object in "try block" of "Program" class, it is caught in "catch block".

Read more:

• Exception handling in C#
• C# exception handling with multiple catch blocks