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Compiler Error CS1670

params is not valid in this context

A number of C# features are incompatible with variable argument lists, and do not allow the paramskeyword, including the following:

  • Parameter lists of anonymous methods

  • Overloaded operators

The following sample generates CS1670:

// CS1670.cs
public class C
{
    public bool operator +(params int[] paramsList)  // CS1670
    {
        return false;
    }

    static void Main()
    {
    }
}

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