如何在表格控件上使用保存功能

我有一个表单，我可以通过按下表单上的按钮将选项卡添加到tabcontrol中。有4个文本框，然后是选项卡的名称。我添加了using system.io;

我应该从哪里开始为所有的选项卡创建一个保存?我已经创建了保存按钮，只是不知道从哪里开始。我想我需要一个循环。

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        public string status = "no";
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            string name = txtName.Text;

            //validate information
            try { }
            catch { }
            //create new tab
            string title = name;
            TabPage myTabPage = new TabPage(title);
            tabControl1.TabPages.Add(myTabPage);

            //Add Labels
            Label lb = new Label();
            lb.Text = "Denomination:";
            lb.Location = new System.Drawing.Point(150, 75);
            lb.Name = "lbl";
            lb.Size = new System.Drawing.Size(100, 20);
            myTabPage.Controls.Add(lb);
            Label lb2 = new Label();
            lb2.Text = "Year:";
            lb2.Location = new System.Drawing.Point(150, 120);
            lb2.Name = "lbl2";
            lb2.Size = new System.Drawing.Size(100, 20);
            myTabPage.Controls.Add(lb2);
            Label lb3 = new Label();
            lb3.Text = "Grade:";
            lb3.Location = new System.Drawing.Point(150, 165);
            lb3.Name = "lbl3";
            lb3.Size = new System.Drawing.Size(100, 20);
            myTabPage.Controls.Add(lb3);
            Label lb4 = new Label();
            lb4.Text = "Mint Mark:";
            lb4.Location = new System.Drawing.Point(150, 210);
            lb4.Name = "lbl4";
            lb4.Size = new System.Drawing.Size(100, 20);
            myTabPage.Controls.Add(lb4);
            //Add text boxes
            TextBox tb = new TextBox();
            tb.Location = new System.Drawing.Point(250, 75);
            tb.Name = "txt";
            tb.Size = new System.Drawing.Size(184, 20);
            myTabPage.Controls.Add(tb);
            TextBox tb1 = new TextBox();
            tb1.Location = new System.Drawing.Point(250, 120);
            tb1.Name = "txt1";
            tb1.Size = new System.Drawing.Size(184, 20);
            myTabPage.Controls.Add(tb1);
            TextBox tb2 = new TextBox();
            tb2.Location = new System.Drawing.Point(250, 165);
            tb2.Name = "txt2";
            tb2.Size = new System.Drawing.Size(184, 20);
            myTabPage.Controls.Add(tb2);
            TextBox tb3 = new TextBox();
            tb3.Location = new System.Drawing.Point(250, 210);
            tb3.Name = "txt3";
            tb3.Size = new System.Drawing.Size(184, 20);
            myTabPage.Controls.Add(tb3);
            //put data inside of textboxes
            tb.Text = txtCoin.Text;
            tb1.Text = txtYear.Text;
            tb2.Text = txtGrade.Text;
            tb3.Text = txtMint.Text;
            // Add delete button
            Button bn = new Button();
            bn.Location = new System.Drawing.Point(560, 350);
            bn.Name = "btnDelete";
            bn.Text = "Delete";
            bn.Size = new System.Drawing.Size(100, 50);
            bn.Click += MyClick;
            myTabPage.Controls.Add(bn);
        }
        private void MyClick(object sender, EventArgs e)
        {
            Form2 myform = new Form2();
            myform.ShowDialog();


            if (status == "yes")
            { tabControl1.TabPages.Remove(tabControl1.SelectedTab); }
            status = "no";
        }
        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            int counter;
            int ccounter;
            string outLine;
            string pathFileName = Path.Combine(Application.StartupPath, "coins.dat");
            StreamWriter writeIt = new StreamWriter(pathFileName);
            for (counter = 0; ((tabControl1.TabCount) -1) != 0 ;)
            {
            }
            writeIt.Close();
        }
    }
}

foreach (TabPage tabPage in tabControl.TabPages)

for (counter = 0; counter < tabControl1.TabCount; counter++)
{  
    // Save the tab
}