How to access bit n from byte[x] ?

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C#3.5

Hi All.
I define the byte array as below:

byte[] QsnC = new byte[120];

I wanna access to byte[n] and bit x in loop for set and get bit, How do best it ?


thanks a lot
Best Regards...

What I have tried:

for (int i = 1; i <= this.tb.Rows.Count; i++)
{
	for (int Count = 1; Count <= 4; Count++)
	{

		if (Chk.Checked)
		{
			get_chk[i] = Chk.ID.Remove(0, 4);
		}
	}
}

Output:
get_chk[0]:1_1
get_chk[1]:1_2
,...
I wanna set bit 1 from QsnC[1] or bit 2 from QsnC[2] , How do it in loop