I am new to C# user interface. I have created a window as shown in the first image. But if the user drag the window and make it bigger, I would like for it to make each
You can add a TableLayoutPanel to your Form. Per default this panel has two columns and two rows.
Then you add one TextBox to each cell and set the Dock-Property of each TextBox to Fill.
The last step thing to do is either set the Dock-Property of your TableLayoutPanel to Fill or set the Anchor-Property of your TableLayoutPanel to Left | Right | Bottom | Top. Then your panel will be resized together with the Form.
All these steps can be done with the designer.