console-readkey

C# – Waiting for user input in a Console App

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The following code shows how to wait for user input in a Console App: When the user types something in and presses the Enter key, Console.ReadLine() will return what they typed. Console.ReadLine() vs Console.ReadKey() Console.ReadLine() waits for the user to press Enter, and then returns everything they typed in. Console.ReadKey() returns individual key presses. It … Read more

KeyNotFoundException: The given key was not present in the dictionary

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Problem The following exception is thrown when you try to get a value from a dictionary using a key that doesn’t exist in the dictionary: KeyNotFoundException: ‘The given key was not present in the dictionary.’ Consider the following the example of initializing a dictionary with a few key/value pairs, and then trying to access non-existent … Read more