Question

How to use ArgumentNullException() method that call with invalid arguments in C#

Answer 1

using System;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                Test(null);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }
        static void Test(string s)
        {
            if (s == null)
            {
                throw new ArgumentNullException("s");
            }
        }
    }
}


/*
run:
 
System.ArgumentNullException: Value cannot be null.
Parameter name: s
   at ConsoleApplication_C_Sharp.Program.Test(String s) in d:\ConsoleApp
lication_C_Sharp\ConsoleApplication_C_Sharp\Program.cs:line 22
   at ConsoleApplication_C_Sharp.Program.Main(String[] args) in d:\Conso
leApplication_C_Sharp\ConsoleApplication_C_Sharp\Program.cs:line 11

*/

 

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Answer 2

using System;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                Test("");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }
        static void Test(string s)
        {
            if (s.Length == 0)
            {
                throw new ArgumentException("argument: s.Length = 0", "s");
            }
        }
    }
}


/*
run:
 
System.ArgumentException: argument: s.Length = 0
Parameter name: s
   at ConsoleApplication_C_Sharp.Program.Test(String s) in d:\ConsoleApp
lication_C_Sharp\ConsoleApplication_C_Sharp\Program.cs:line 22
   at ConsoleApplication_C_Sharp.Program.Main(String[] args) in d:\Conso
leApplication_C_Sharp\ConsoleApplication_C_Sharp\Program.cs:line 11

*/

 

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