C# Error CS1910 – Argument of type ‘{0}’ is not applicable for the DefaultParameterValue attribute

C# Error

CS1910 – Argument of type ‘{0}’ is not applicable for the DefaultParameterValue attribute

Reason for the Error & Solution

Argument of type ‘type’ is not applicable for the DefaultValue attribute

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

Example

The following sample generates CS1910.

// CS1910.cs  
// compile with: /target:library  
using System.Runtime.InteropServices;  
  
public interface MyI  
{  
   void Test([DefaultParameterValue(typeof(object))] object o);   // CS1910  
}