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1 post about User-defined Methods by 1 contributor.
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In C#, extension methods are a powerful feature that allows you to add new methods to existing classes without modifying their source code. A custom extension method in C# is a user-defined method that is added to an existing class or interface using the this keyword as the first parameter of the method. This enables you to invoke the extension method on instances of the target class or interface as if it were a native method.
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