Incrementing a numerical value in a dictionary

I'm using the code below to either increment or insert a value in a dictionary. If the key I'm incrementing doesn't exist I'd like to set its value to 1.

 public void IncrementCount(Dictionary<int, int> someDictionary, int id) {       int currentCount;     if (someDictionary.TryGetValue(id, out currentCount))     {         someDictionary[id] = currentCount + 1;     }     else     {         someDictionary[id] = 1;     } }

Is this an appropriate way of doing so?