KeyNotFoundException Collection C# Example

Collections > Generic > KeyNotFoundException 

This is thrown when try to retrieve an element from a collection using a key that does not exist in that collection.

Example

   Dictionary<string, string> dict = new Dictionary<string, string>();

   dict.Add("key1","value1");

   try

   {

       string val = dict["key2"];

   }

   catch (KeyNotFoundException)

   {

       throw new KeyNotFoundException("KeyNotFoundException!");

   }