Use the NullReferenceException. : Predefined Exception « Language Basics « C# / CSharp Tutorial

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C# / CSharp Tutorial » Language Basics » Predefined Exception

1.23.1.Use the NullReferenceException.

using System;  

  

class MainClass {   

  public static void Main() {   



    try { 

      string str = null;

      Console.WriteLine(str.ToString());

      

    } catch (NullReferenceException) { 

      Console.WriteLine("NullReferenceException!"); 

      Console.WriteLine("fixing...\n"); 

 

    } 

 

  }  

}

NullReferenceException!
fixing...

1.23.Predefined Exception
	1.23.1.	Use the NullReferenceException.
	1.23.2.	Throwing Exceptions: ArgumentNullException
	1.23.3.	Handle ArgumentOutOfRangeException
	1.23.4.	Check OverflowException for long
	1.23.5.	Generate an index out-of-bounds exception
	1.23.6.	Define exception variable in catch statement: DivideByZeroException

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