How do I format a double to a string and only show decimal digits when necessary?

Question

I have code like:

lblFranshizShowInvwNoskhehEdit.Text = string.Format(\"{0:n}\",
    (double)(int.Parse(drDarman[\"FranshizDarsad\"].ToString()) * 
        C         


        

Answer 1

this is mine :

string.Format("{0:n2}", double);