Compiler Error CS1910

Argument of type 'type' is not applicable for the DefaultParameterValue attribute

For parameters whose type is object, the argument of the DefaultParameterValueAttribute must be null, an integral type, a floating point, bool, string, enum, or char. The argument can not be of type Type or any array type.

Example

The following sample generates CS1910:

// CS1910.cs
// compile with: /target:library
using System.Runtime.InteropServices;

public interface ISomeInterface
{
    void Bad1([DefaultParameterValue(typeof(object))] object o);   // CS1910
    void Bad2([DefaultParameterValue(new int[] { 1, 2 })] int[] arr);   // CS1910
}