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TextBoxBase.BorderStyle Property

Gets or sets the border type of the text box control.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public BorderStyle BorderStyle { get; set; }

Property Value

Type: System.Windows.Forms.BorderStyle
A BorderStyle that represents the border type of the text box control. The default is Fixed3D.


A value that is not within the range of valid values for the enumeration was assigned to the property.

You can use the BorderStyle property to create borderless and flat style controls, in addition to the default three-dimensional control.


The derived class, RichTextBox, does not support the BorderStyle.FixedSingle style. This style will cause the BorderStyle to use the BorderStyle.Fixed3D style instead.

The following code example uses TextBox, a derived class, to create a text box that can properly display text using 20-point Arial with a single border. This example uses the PreferredHeight property to determine the appropriate height of the control after the font and BorderStyle have been assigned to the control.

public void CreateTextBox()
    // Create an instance of the TextBox control.
    TextBox textBox1 = new TextBox();

    // Set the TextBox Font property to Arial 20.
    textBox1.Font = new Font ("Arial" , 20);
    // Set the BorderStyle property to FixedSingle.
    textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
    // Make the height of the control equal to the preferred height.
    textBox1.Height = textBox1.PreferredHeight;

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.