C#

<br />
using System;<br />
using System.Drawing;<br />
using System.Collections;<br />
using System.ComponentModel;<br />
using System.Windows.Forms;<br />
using System.Data;<br />
<br />
namespace TestApp<br />
{<br />
	/// <summary><br />
	/// Summary description for Form1.<br />
	/// </summary><br />
	public class Form1 : System.Windows.Forms.Form<br />
	{<br />
		private System.Windows.Forms.Label label1;<br />
		public System.Windows.Forms.RichTextBox txtFromSecondClass;<br />
		public System.Windows.Forms.RichTextBox txtToSecondClass;<br />
		private System.Windows.Forms.Label label2;<br />
		private System.Windows.Forms.Button button1;<br />
		/// <summary><br />
		/// Required designer variable.<br />
		/// </summary><br />
		private System.ComponentModel.Container components = null;<br />
<br />
		public Form1()<br />
		{<br />
			//<br />
			// Required for Windows Form Designer support<br />
			//<br />
			InitializeComponent();<br />
<br />
			//<br />
			// TODO: Add any constructor code after InitializeComponent call<br />
			//<br />
		}<br />
<br />
		/// <summary><br />
		/// Clean up any resources being used.<br />
		/// </summary><br />
		protected override void Dispose( bool disposing )<br />
		{<br />
			if( disposing )<br />
			{<br />
				if (components != null) <br />
				{<br />
					components.Dispose();<br />
				}<br />
			}<br />
			base.Dispose( disposing );<br />
		}<br />
<br />
		#region Windows Form Designer generated code<br />
		/// <summary><br />
		/// Required method for Designer support - do not modify<br />
		/// the contents of this method with the code editor.<br />
		/// </summary><br />
		private void InitializeComponent()<br />
		{<br />
			this.txtFromSecondClass = new System.Windows.Forms.RichTextBox();<br />
			this.label1 = new System.Windows.Forms.Label();<br />
			this.txtToSecondClass = new System.Windows.Forms.RichTextBox();<br />
			this.label2 = new System.Windows.Forms.Label();<br />
			this.button1 = new System.Windows.Forms.Button();<br />
			this.SuspendLayout();<br />
			// <br />
			// txtFromSecondClass<br />
			// <br />
			this.txtFromSecondClass.Location = new System.Drawing.Point(8, 200);<br />
			this.txtFromSecondClass.Name = "txtFromSecondClass";<br />
			this.txtFromSecondClass.Size = new System.Drawing.Size(280, 64);<br />
			this.txtFromSecondClass.TabIndex = 0;<br />
			this.txtFromSecondClass.Text = "";<br />
			// <br />
			// label1<br />
			// <br />
			this.label1.Location = new System.Drawing.Point(8, 176);<br />
			this.label1.Name = "label1";<br />
			this.label1.Size = new System.Drawing.Size(272, 16);<br />
			this.label1.TabIndex = 1;<br />
			this.label1.Text = "From SecondClass:";<br />
			// <br />
			// txtToSecondClass<br />
			// <br />
			this.txtToSecondClass.Location = new System.Drawing.Point(8, 32);<br />
			this.txtToSecondClass.Name = "txtToSecondClass";<br />
			this.txtToSecondClass.Size = new System.Drawing.Size(280, 64);<br />
			this.txtToSecondClass.TabIndex = 2;<br />
			this.txtToSecondClass.Text = "";<br />
			// <br />
			// label2<br />
			// <br />
			this.label2.Location = new System.Drawing.Point(8, 8);<br />
			this.label2.Name = "label2";<br />
			this.label2.Size = new System.Drawing.Size(272, 16);<br />
			this.label2.TabIndex = 3;<br />
			this.label2.Text = "Send To SecondClass:";<br />
			this.label2.Click += new System.EventHandler(this.label2_Click);<br />
			// <br />
			// button1<br />
			// <br />
			this.button1.Location = new System.Drawing.Point(24, 120);<br />
			this.button1.Name = "button1";<br />
			this.button1.Size = new System.Drawing.Size(240, 32);<br />
			this.button1.TabIndex = 4;<br />
			this.button1.Text = "Send To Second Class";<br />
			this.button1.Click += new System.EventHandler(this.button1_Click);<br />
			// <br />
			// Form1<br />
			// <br />
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);<br />
			this.ClientSize = new System.Drawing.Size(292, 273);<br />
			this.Controls.Add(this.button1);<br />
			this.Controls.Add(this.label2);<br />
			this.Controls.Add(this.txtToSecondClass);<br />
			this.Controls.Add(this.label1);<br />
			this.Controls.Add(this.txtFromSecondClass);<br />
			this.Name = "Form1";<br />
			this.Text = "Form1";<br />
			this.ResumeLayout(false);<br />
<br />
		}<br />
		#endregion<br />
<br />
		/// <summary><br />
		/// The main entry point for the application.<br />
		/// </summary><br />
		[STAThread]<br />
		static void Main() <br />
		{<br />
			Application.Run(new Form1());<br />
		}<br />
		private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			SecondClass.transferText(txtToSecondClass.Text);<br />
		}<br />
<br />
		private void label2_Click(object sender, System.EventArgs e)<br />
		{<br />
		<br />
		}<br />
	}<br />
}<br />

<br />
using System;<br />
<br />
namespace TestApp<br />
{<br />
	/// <summary><br />
	/// Summary description for SecondClass.<br />
	/// </summary><br />
	public class SecondClass<br />
	{<br />
		public static void transferText(string x)<br />
		{<br />
			Form1 formObj = new Form1();<br />
			formObj.txtFromSecondClass.Text = x;<br />
		}<br />
	}<br />
}<br />