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Compiler Error CS0115

'function' : no suitable method found to override

A method was marked as an override, but the compiler found no method to override. For more information, see override (C# Reference), and Knowing When to Use Override and New Keywords (C# Programming Guide).

The following sample generates CS0115. You can resolve CS0115 in one of two ways:

  • Remove the override keyword from the method in MyClass2.

  • Use MyClass1 as a base class for MyClass2.

// CS0115.cs
namespace MyNamespace
    abstract public class MyClass1
        public abstract int f();

    abstract public class MyClass2
        public override int f()   // CS0115
            return 0;

        public static void Main()

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