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Compiler Error CS1670 

Error Message

params is not valid in this context

A number of C# features are incompatible with variable argument lists, and do not allow the params keyword, 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()