hi

just a quick question - i  have the something like the following

public abstract class ClassA
{
   protected int iA;

   public int Value { get {return iA;} set { iA = value;}}

   public ClassA(int value)
   { iA = value; }

    public static ClassA operator +(ClassA a1, ClassA a2)
    {
        a1.Value = a1.Value + a2.Value;
         return a1;
   }

    public static ClassA operator -(ClassA a1, ClassA a2)
    {
        a1.Value = a1.Value - a2.Value;
         return a1;
   }
}

public class ClassB : ClassA
{
     public ClassB(int value) : base(value)
     { }
}

public class ClassC : ClassA
{
     public ClassB(int value) : base(value)
     { }
}

Problem is, if i try this
ClassB cb1 = new ClassB(1);
ClassB cb2 = new ClassB(2);
ClassB cb3 = cb1 + cb2;

I get an error as cb1 + cb2 is of type ClassA....

Question: Is there a way of putting all my operator overloads in the base
class and instead of having to put them in each of the derived classes?

Thanks
t f