# Thickness.LeftThickness.LeftThickness.LeftThickness.Left Property

## 定義

``````public:
property double Left { double get(); void set(double value); };``````
``public double Left { get; set; }``
``member this.Left : double with get, set``
``Public Property Left As Double``

#### 屬性值

Double，代表這個 Thickness 執行個體之周框左邊的寬度 (以像素為單位)。A Double that represents the width, in pixels, of the left side of the bounding rectangle for this instance of Thickness. 像素等於 1/96 英吋。a pixel is equal to 1/96 on an inch. 預設值為 0。The default is 0.

## 範例

``````myBorder2 = new Border();
myBorder2.BorderBrush = Brushes.SteelBlue;
myBorder2.Width = 400;
myBorder2.Height = 400;
myThickness = new Thickness();
myThickness.Bottom = 5;
myThickness.Left = 10;
myThickness.Right = 15;
myThickness.Top = 20;
myBorder2.BorderThickness = myThickness;
``````
``````Dim myBorder2 As New Border()
myBorder2.BorderBrush = Brushes.SteelBlue
myBorder2.Width = 400
myBorder2.Height = 400
Dim myThickness As New Thickness()
myThickness.Bottom = 5
myThickness.Left = 10
myThickness.Right = 15
myThickness.Top = 20
myBorder2.BorderThickness = myThickness
``````
``````<Border BorderBrush="SteelBlue" Width="400" Height="400" Canvas.Left="100" Canvas.Top="100">
<Border.BorderThickness>
10,20,15,5
</Border.BorderThickness>
</Border>
``````