# Extension Method

A static method callable as though it were an instance method of another type.

## What is **Extension Method** in C#?

**Extension Method** — A static method callable as though it were an instance method of another type.

```csharp
static class StringExtensions
{
    public static bool IsBlank(this string text)
    {
        return string.IsNullOrWhiteSpace(text);
    }
}
```

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Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/extension-method