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Compiler Error CS0709 

Error Message

'derived class': cannot derive from static class 'base class'

A static class cannot be instantiated or derived from. That is, a static class cannot be a base class of any other class.

Example

The following sample generates CS0709.

// CS0709.cs
// compile with: /target:library
public static class Base {}
public class Derived : Base {}   // CS0709
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