private void button1_Click(object sender, EventArgs e)
        {
            string[] seq1 = { "A", "C", "G", "T", "A", "C", "A", "G","T","G" };
            string[] seq2 = { "T", "A", "C", "A", "C", "G","A","A","G","T" };
            string[] res1 = new string[seq1.Length];
            string[] res2 = new string[seq1.Length];
            for (int i = 0; i <= 4; i++)
            {
                res1[i] = seq1[i];
                res2[i] = seq2[i];
                textBox1.Text +=" "+ res1[i];
                textBox2.Text +=" "+ res2[i];
            }
            for(int i = 5; i < seq1.Length; i++)
            {
                if (seq1[i] == "T" )
                {
                    res1[i] = "A";
                    
                }
                else
                    if (seq1[i] == "A" )
                {
                    res1[i] = "T";
                    
                }
                else
                   if (seq1[i] == "C" )
                {
                    res1[i] = "G";
                    
                }
                else
                   if (seq1[i] == "G" )
                {
                    res1[i] = "C";
                    
                }
                textBox1.Text += res1[i]+"   ";
               
            }
            for (int i = 5; i < seq2.Length; i++)
            {
                if (seq2[i] == "T")
                {
                    res2[i] = "A";
                }
                else
                    if (seq2[i] == "A")
                {
                    res2[i] = "T";
                }
                else
                   if (seq2[i] == "C")
                {
                    res2[i] = "G";
                }
                else
                   if (seq2[i] == "G")
                {
                    res2[i] = "C";
                }
               
                textBox2.Text += res2[i] + "   ";
            }
        }