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Compiler Error CS0418 

Error Message

'class name': an abstract class cannot be sealed or static

An abstract class cannot be used to create objects unless it is derived from, so it makes no sense to be sealed. An abstract class cannot meaningfully be static either; abstract classes are designed to support an object hierarchy that will use the abstract class as a base.


The following sample generates CS0418:

// CS0418.cs
public abstract sealed class C  // CS0418

sealed static class S  // CS0418

public class MyClass
    public static void Main()
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