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KeyNotFoundException in C#
The KeyNotFoundException is thrown when a key you are finding is not available in the Dictionary collection.
Let us see an example −
Example
using System;
using System.Collections.Generic;
public class Demo {
public static void Main() {
try {
var dict = new Dictionary<string, string>() {
{"TV", "Electronics"},
{"Laptop", "Computers"},
};
Console.WriteLine(dict["Pen Drive"]);
}
catch (Exception e) {
Console.WriteLine(e);
}
}
}The following is the output. The error KeyNotFoundException is visible since the key is not in the Dictionary −
Output
System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <902ab9e386384bec9c07fa19aa938869>:0
Updated on: 22-Jun-2020
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