Extension methods with a c# example

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Emily Foster · Answer

Absolutely! Extension methods in C# allow you to add new methods to existing classes without modifying the original class or creating a new derived class. This can be quite handy when you want to extend the functionality of classes that you can't modify directly, such as built-in .NET framework classes. Here's a simple example to illustrate how extension methods work in C#: using System; public static class StringExtensions { public static bool IsPalindrome(this string input) { string reverse = ""; for (int i = input.Length - 1; i >= 0; i--) { reverse += input[i]; } return input == reverse; } } class Program { static void Main() { string word = "radar"; bool isPalindrome = word.IsPalindrome(); Console.WriteLine($"{word} is a palindrome: {isPalindrome}"); } } In this example, we define an extension method `IsPalindrome` for the `string` class. The `IsPalindrome` method checks if a given string is a palindrome (reads the same backward as forward). We then call this extension method on a string variable in the `Main` method. Extension methods can be quite powerful for adding custom functionality to existing classes or frameworks without altering their original source code. They provide flexibility and versatility in C# programming.

Extension methods with a c# example

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