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Compiler Error CS0508

Visual Studio 2008

'Type 1': return type must be 'Type 2' to match overridden member 'Member Name'

An attempt was made to change the return type in a method override. To resolve this error, make sure both methods declare the same return type.

The following sample generates CS0508.

// CS0508.cs
// compile with: /target:library
abstract public class Clx
{
   public int i = 0;
   // Return type is int.
   abstract public int F();
}

public class Cly : Clx
{
   public override double F()
   {
      return 0.0;   // CS0508
   }
}
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