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How to Access a Random Element from a List in C#?

Susan Sarandon
Susan SarandonOriginal
2025-01-19 14:27:14743browse

How to Access a Random Element from a List in C#?

Randomly Selecting List Items in C#

Retrieving a random element from a C# list is a frequent programming need. This can be accomplished using the Random class. Here's a step-by-step guide:

  1. Instantiate the Random Number Generator: Create a single instance of the Random class. For consistent random number generation, it's best practice to declare this as a static field.

    <code class="language-csharp"> static Random rnd = new Random();</code>
  2. Generate a Random Index: Use the rnd instance to produce a random integer within the bounds of your list's size.

    <code class="language-csharp"> int randomIndex = rnd.Next(list.Count);</code>
  3. Access and Display the Element: Retrieve the list element at the randomly generated index and display it (here, using a MessageBox).

    <code class="language-csharp"> MessageBox.Show((string)list[randomIndex]);</code>

This approach allows for the random selection and display of a string from a list (or ArrayList).

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