unisgned integers and global cases in C#

Question

I am used to C++ more than C#.

In C++ you have header files and you have the ability to declare states.  For example, you can declare a series of unsigned integers to be for a variety of different states to later use in switch statements or if-then statements.

Since C# does not have the same sort of structure with header files, how would I impliment a simular functionality in C#?

The reason why I want to use UINT is because you can do that super cool bit-wise and and or with them.  Remember those good ol' days?  You could define four different conditions like this:

UINT state_001  2
UINT state_002  4
UINT state_003  8
UINT state_004  16

Then a variable can be any one state or any combination of states.  To assign a variable a particular state, you do a bitwise and to the variable.  To see if the variable was set to any of the states, you do a bitwise or.

How would that look like in Visual C#?