pass system.array by ref?

[jmrieman]

first off, I am an IT pro trying to dust off the cobwebs of programming in a
Master degree program so please be nice:)

I am trying to pass a system.array object by reference to a procedure (or
class) and keep getting the compile error "an object reference is required
for the nonstatic field, method, or property... (you know the rest) .. please
look at my code and tell me why my pass by reference is not working

static void Main(string[] args)
{
//
// TODO: Add code to start application here
//
try
{
Array arrayHeap = Array.CreateIns tance(typeof(in t),0);

// THIS SYSTEM.ARRAY WILL RESIZE and HAVE Array.Length > 1
arrayHeap = Class1.Collect_ InputFiles(sInp utFile1, sInputFile2, arrayHeap);

//****THIS IS MY PROBLEM STATEMENT
Heapify(ref arrayHeap,array Heap.Length);

}
catch(Exception e)
{
Console.WriteLi ne("exception " + e.ToString());
}
}

public void Heapify(ref System.Array tempHeap, int n)
{
Console.WriteLi ne("Begin Heapify");
try
{
Console.WriteLi ne("i/2 will be =" + n/2);

for (int i = n/2; i >= 1; i--)
{
Console.WriteLi ne("Heapify : Loop #" + i.ToString());

//****I WANT TO STILL REFERENCE THE SAME ARRAY HERE

SiftDown(ref tempHeap,i,n);

}
}
catch (Exception e)
{
Console.WriteLi ne("exception " + e.ToString());
}
}

public void SiftDown(Array arrayHeap, int i , int n)
{

try
{
int temp = Convert.ToInt32 (arrayHeap.GetV alue(i-1));

while (2*i <= n)
{
int child = 2 * i;

if ((child < n)
&& (Convert.ToInt3 2(arrayHeap.Get Value(child)) >
Convert.ToInt32 (arrayHeap.GetV alue(child-1))))
{
child = child + 1;

}

if (Convert.ToInt3 2(arrayHeap.Get Value(child-1)) > temp)
{
arrayHeap.SetVa lue(Convert.ToI nt32
arrayHeap.GetVa lue (child-1)),i-1);
}
else
{
break;
}

i = child;
}

arrayHeap.SetVa lue(temp, i-1);
}
catch(Exception e)
{
Console.WriteLi ne("exception " + e.ToString());
}

}