C# USER DIFINED

The following program should fit the bill:

using System;

class CustomException : Exception // all exceptions derive from System.Exception class

{
// pass message to base class
// can't set Message property directly as it's read only

public CustomException(string message) : base(message)

{

}

class MyClass

{

private int number;

public void SetNumber(int value)

{

if (value > 10) // if value more than 10 throw custom exception

{

throw new CustomException("Value can't be more than 10");

}

number = value; // otherwise set number to value

}

class Test

{

static void Main()

{

MyClass mc = new MyClass();

mc.SetNumber(3);

mc.SetNumber(11); // exception thrown on this line

}

}

When this program is run the output is:

Unhandled Exception: CustomException: Value can't be more than 10

at MyClass.SetNumber(Int32 value)

at Test.Main()

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