<?xml version="1.0" encoding="us-ascii"?>
<ErrorDocumentation xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <ErrorName>CS0661</ErrorName>
  <Examples>
    <string>// cs0661.cs: `T' defines operator == or operator != but does not override Object.GetHashCode()
// Line: 5
// Compiler options: -warnaserror -warn:3

class T
{
        public static bool operator == (object o, T t)
        {
            return false;
        }

        public static bool operator != (object o, T t)
        {
            return true;
        }
        
        public override bool Equals(object o)
        {
            return true;
        }
}
</string>
  </Examples>
</ErrorDocumentation>