Export (0) Print
Expand All
Expand Minimize

Compiler Error CS0023 

Error Message

Operator 'operator' cannot be applied to operand of type 'type'

An attempt was made to apply an operator to a variable whose type was not designed to work with the operator. For more information, see Data Types (C# Programming Guide) and C# Operators.

The following sample generates CS0023:

// CS0023.cs
namespace x
{
   public class a
   {
      public static void Main()
      {
         string s = "hello";
         s = -s;   // CS0023, minus operator not allowed on strings
      }
   }
}

Community Additions

ADD
Show:
© 2014 Microsoft