C#有两个form，form1和form2，form1下有button1和button2点击button1后form2出现点击button2后在form的

C#有两个form，form1和form2，form1上有button1和button2点击button1后form2出现点击button2后在form的
C#有两个form，form1和form2，form1上有button1和button2，点击button1后form2出现，点击button2后在form2的textbox1出现1234，应该怎么编写代码啊？我的form2出现在form1的指定panel1上，我的button1点击事件下的代码是


 private void button1_Click(object sender, EventArgs e)
        {
            Form Form30 = new Form2();  
            Form30.TopLevel = false;
            Form30.Parent = panel1;
            Form30.Size = panel1.Size;
            Form30.Anchor = AnchorStyles.Left | AnchorStyles.Right | AnchorStyles.Top | AnchorStyles.Bottom;
            Form30.Show();
        }
现在只是不知道button2点击之后 的代码应该怎么编写，求各位前辈指点，新学c#
[解决办法]
 Form2 fr2 = new Form2();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //string date = "2013-3-21";
            //label1.Text = Convert.ToDateTime(date).ToLongDateString();
            fr2.Show();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            TextBox tb = (TextBox)fr2.Controls.Find("textBox1", true)[0];
            tb.Text = "1234";
            
        }
[解决办法]

 //Form2中假如如下代码
public string Form2Value 
{ 
     get 
     { 
          return this.textBox1.Text; 
     } 
     set 
     { 
         this.textBox1.Text = value; 
     } 
} 
//Form1调用
Form2 myForm = new Form2();
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e) 
 
        {
            
            myForm.TopLevel = false;
            myForm.Parent = panel1;
            myForm.Anchor = AnchorStyles.Left 
[解决办法]
 AnchorStyles.Right 
[解决办法]
 AnchorStyles.Top 
[解决办法]
 AnchorStyles.Bottom;
            myForm.Show();
        }

        private void button2_Click(object sender, EventArgs e)
        {
               myForm.Form2Value = "1234";
        }

public delegate void  Delegateshow();
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Form2 form2 = new Form2();
        private void Form1_Load(object sender, EventArgs e)
        {
        }

        private void button1_Click(object sender, EventArgs e)
        {
            form2.Show();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.button2.Invoke(new Delegateshow(send));
        }
        void send()
        {
            form2.textBox1.Text = "1234";//要把form2  的textBox1 设为Public
        }
    }