Question

How to throw KeyNotFoundException from a Dictionary in C#

Answer 1

using System;
using System.Collections.Generic;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
               Dictionary<string, int> dic = new Dictionary<string, int>();

               dic.Add("c#", 100);

               int value = dic["c++"];
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }
    }
}


/*
run:
     
System.Collections.Generic.KeyNotFoundException: The given key was not present i
n the dictionary.
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at ConsoleApplication_C_Sharp.Program.Main(String[] args) in d:\Conso
leApplication_C_Sharp\ConsoleApplication_C_Sharp\Program.cs:line 16
 
*/

 

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