sortedlist question

[Crash893]

Hi all

I'm totaling up a list of items in a Binding source and I am just having a small problem with syntax for incrementing the value of a key if it already exists


any help is greatly appreciated line 16 below

SortedList mySortedList = new SortedList();
            foreach (DataRowView view in myBindingSource)
            {
                if ((string)view["group_name"] == "USAT-Desktop") 
                {
                    view["group_name"] = "TEST TEST";
                }
               
                
               if (mySortedList.Contains(view["category_name"])== false)
               {
                   mySortedList.Add(view["category_name"], 1);
               }
               else
               {
               //how do I ++ the value of the key if it already exists?
               //mysortedlist[view["category_name"]].value +=1? 
               }