Once you've created a graphics layer (as described in How to add a graphics layer), you need to add graphics to it to display data. In most cases, you'll create graphics using geometries that have been created by actions such as executing a query or drawing a shape on the map.
/ Classtalk : A classroom communication system for active learning. In: Journal of Computing in Higher Education. 1996 ; Vol. 7, No. 2. pp. 3-47 @article{cc819104b3034becb09019ef6c28d94c,
Like with C++, what C# calls classes are an expansion on the struct concept from C, but there are no pointers in C# code, unless you explicitly go into native mode. I forget how this is done, but it is possible to go down to the machine level, inside a confined space, inside a C# program.