Question

How to use try catch throw in C#

Answer 1

using System;
  
class Program
{
    static void test(string s) {
        if (s == null) {
            throw new ArgumentNullException();
        }
    }
  
    static void Main()
    {
        string s = null; 
  
        try { 
            test(s);
        }
        catch (Exception ex) {
            Console.WriteLine("catch (Exception ex): {0}", ex);
        }
    }
}
  
  
  
  
/*
run:
  
catch (Exception ex): System.ArgumentNullException: Value cannot be null.
  at Program.Main () [0x00002] in <06380fb13dc741b4b4b44fee5649d698>:0 
  
*/

 

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Answer 2

using System;
 
class Program
{
    static void test(string s) {
        if (s == null) {
            throw new ArgumentNullException();
        }
    }
 
    static void Main()
    {
        try {
            string s = null;
            test(s);
        }
        catch (ArgumentNullException ex) {
            Console.WriteLine("catch (ArgumentNullException ex): {0}", ex);
        }
        catch (Exception ex) {
            Console.WriteLine("catch (Exception ex): {0}", ex);
        }
    }
}
 
 
 
 
/*
run:
 
catch (ArgumentNullException ex): System.ArgumentNullException: Value cannot be null.
  at Program.Main () [0x00002] in <d1d2cd0e27104097b286d3b2e5edcf4a>:0 
 
*/

 

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