how to get checkbox value in c#

p1.cmd = new OleDbCommand("insert into pass(name,pass,type1,add,edit,dele) values ('" + C1.Text.Trim() + "','" + textBox1.Text + "','" + C2.Text + "'," + (Ck1.Checked ? 1 : 0) + "," + (Ck2.Checked ? 1 : 0) + "," + (Ck3.Checked ? 1 : 0) + ")", p1.Cn);

here we get ck1.checked?1:0 = 1 while checked;
ck1.checked?1:0 = 0 while Unchecked;

Thank you !