int[] fib; // fib is of type int[], "array of int"
fib = new int[100]; // create a 100-element int array

fib[0] = fib[1] = 1;
for( int i=2; i<100; ++i ) fib[i] = fib[i-1] + fib[i-2];

Collections.Hashtable h =  new Collections.Hashtable();
h["a"] = 123; // note: using a string as the index

[attribute(AllowMultiple=true)]
public class Attr 
{
}

unsafe fixed ( int* p = fib )   // p points to fib from earlier example
{
    p[0] = p[1] = 1;
    for( int i=2; i<100; ++i ) p[i] = p[i-1] + p[i-2];
}