I dont know if I understand what exactly you want, but here is the way to use pointers in C#:
Your code must be "unsafe", wherever you want pointers to work;
Ex:
unsafe class MyClass
{
}
-But how to alow that? You will ask.
Go to "Project" up in your studio an choose "YourProjectName" properties,
Then in "compile" option (second option from up to below if you use visual studio) an mark the checkbox "Allow unsafe cod"
Obs.: My visual studio is in other language so sorry if I wrote some wrong option, but I gave to you the location and the idea.
Hope this help.