How do I get a pointer or equivalent to a struct in C Sharp?

In C I'd have an array of structures then in the code somewhere create a pointer to one of the structures in the array.
This gives me speedy access both read and write to the structure. How do I do this in C Sharp? For example my structure:

Code (csharp):

1.  public struct slot_struct
2.  {
3.     public float Health;
4.     public float SetPower;
5.  
6.     public slot_struct(float health,float setpower)
7.     {
8.       Health = health;
9.       SetPower = setpower;
10.     }
11. }

initialised like so:

Code (csharp):

1. public slot_struct[] Slots =
2. {
3.     new slot_struct(100,25),
4.     new slot_struct(50,10),
5. };
6.  

Then in code what is the way to access the data to read and write it. This example below only lets me read the data as it
seems to create a copy and not be a pointer or reference to the entry in the array:-

Code (csharp):

1.  slot_struct Slot = Slots[1];
2.    Slot.Health = 22.5f;            // This doesn't actually write the data to the struct in the array  which is my problem
3.  

Any ideas? in C I'd just use slot_struct *Slot = &Slots[1];

 

If you're passing this to a function, you can use 'ref'.
Example:
void ModifyHealth ( ref slot_struct slot )
...
ModifyHealth(ref Slots[1]); // Modifies Slots[1]


If you want to reference a something by pointer in general, use a class instead of a struct - all uses of a classed object are by reference, rather than value.
Example:
class Slot
...
Slot[] Slots = new Slot[10];
Slots[1] = new Slot();
...
Slot curSlot = Slots[1];
curSlot.Health = 22.5f; // Modifies Slots[1]

 

Cool, I'll convert the structs to classes and try again. Thanks.

 

classes are ref type
structs are value type

you can actually have pointers in unsafe code blocks:
http://msdn.microsoft.com/en-us/library/y31yhkeb(v=vs.80).aspx