Example with Textbox Control:-

Add a new Form i.e., Form4 to the Windows Forms Application

Create four textBboxes on the Form

Set the following  properties to the labels & textBoxes:

label1:- Name       :    lblNormal Text          :    Normal Textbox label2:- Name      :    lblMultiline Text         :     Multiline Textbox label3:- Name      :    lblPassword Text         :     Password Textbox label4:- Name      :    lblReadonly Text         :    ReadOnlyTextbox

textBox1:- Name     :   txtNormal textBox2:- Name      :   txtMultiline Multiline :  True textBox3:-   Name      :   txtPassword PasswordChar   :   * textBox4:- Name         :    txtReadOnly Text            :     Sampath ReadOnly   :    True

Design:-

Run the Application & Check

Enter the text in textboxes

You cannot edit the data in Readonly Textbox Text bcz it is ReadOnly

Result:-