Question

I have a base class Sport defined as:

public class Sport
{
   public int Id {get; set;}
   public string Name {get; set;}

   public Sport() {}

   public override string ToString()
   {
     string objectState = string.Format("[Id: {0}; Name: {1};]", Id, Name);
     return objectState;
   }
}

and I have second class which inherits the Sport class:

public class Basketball : Sport
{
   public string PointTerm {get; set;}
   public Basketball() {}      

   //overriding ToString()??
}

How do I override ToString from my base Sport class with an additional property PointTerm?

Answer 1

You can just add a new override in your Basketball class:

public override string ToString()
{
    return string.Format("[Id: {0}; Name: {1}; PointTerm: {2};]",
                         Id, Name, PointTerm);
}

Edit:

You could do something like this if you want to keep in sync with the base class’s implementation, but the simpler approach above is probably better in most circumstances:

public override string ToString()
{
    char[] openingBracket = new char[] { '[' };
    char[] closingBracket = new char[] { ']' };     

    string trimmedBaseString = (base.ToString() ?? string.Empty)
                               .TrimStart(openingBracket).TrimEnd(closingBracket);
    return string.Format("[{0} PointTerm: {1};]", trimmedBaseString, PointTerm);
}