FormBorderStyle In .Net
We can set border style of windows form in many ways with the help of Windows.Forms.Form. FormBorderStyle
FormBorderStyle has these members:

None

No border.

FixedSingle

A fixed, single-line border.

Fixed3D

A fixed, three-dimensional border.

FixedDialog

A thick, fixed dialog-style border.

Sizable

A resizable border.

FixedToolWindow

A tool window border that is not resizable.

SizableToolWindow

A resizable tool window border.