CODE:

Test[] test = new Test[100];
foreach (var t in test)
{
	t = new Test();
}

CODE:

Test[] test = new Test[100];
foreach (var i in Enumerable.Range(0, test.Length))
{
	test[i] = new Test();
}

CODE:

Test[,] test = new Test[100, 150];
foreach (var x in Enumerable.Range(0, test.GetLength(0)))
{
	foreach (var y in Enumerable.Range(0, test.GetLength(1)))
	{
		test[x, y] = new Test();
	}
}

CODE:

Test[,] test = new Test[100, 150];
var ex = Enumerable.Range(0, test.GetLength(0));
var ey = Enumerable.Range(0, test.GetLength(1));
var q = from x in ex from y in ey select test[x, y] = new Test();
foreach (var t in q) ;