Through this example I am going to explain how to fill gradient color in the background.A LinearGradientBrush paints a gradient along a line. The line's start and end points are defined by the StartPoint and EndPoint properties of the LinearGradientBrush.<LinearGradientBrush EndPoint="0.504,1.5" StartPoint="0.504,0.03"></LinearGradientBrush>StartPoint Property: Gets or sets the starting two-dimensional coordinates of the linear gradient. This is a dependency property.EndPoint Property: Gets or sets the ending two-dimensional coordinates of the linear gradient. This is a dependency property.GradientStop Class: Describes the location and color of a transition point in a gradient.<GradientStop Color="#FFFFC934" Offset="0"/><GradientStop Color="#FFFFFFFF" Offset="0.567"/>This example shows how to use the LinearGradientBrush class to paint an area with a linear gradient. In the following example, the Background of a Border is painted with linear gradient that transitions from yellow to white.<Border.Background> <LinearGradientBrush EndPoint="0.504,1.5" StartPoint="0.504,0.03"> <GradientStop Color="#FFFFC934" Offset="0"/> <GradientStop Color="#FFFFFFFF" Offset="0.567"/> </LinearGradientBrush></Border.Background><Window x:Class="Gradient.Window1" xmlns=http://schemas.microsoft.com/winfx/2006/xaml/presentationxmlns:x=http://schemas.microsoft.com/winfx/2006/xamlTitle="Gradient" Height="300" Width="400"><Grid> <Border Margin="10,10,10,10" BorderBrush="Red" BorderThickness="1,1,1,1" CornerRadius="8,8,8,8"> <Border.Background> <LinearGradientBrush EndPoint="0.504,1.5" StartPoint="0.504,0.03"> <GradientStop Color="#FFFFC934" Offset="0"/> <GradientStop Color="#FFFFFFFF" Offset="0.567"/> </LinearGradientBrush> </Border.Background> <DockPanel> <StackPanel Width="Auto" Height="235" DockPanel.Dock="Top" Orientation="Horizontal" VerticalAlignment="Top"> <StackPanel Margin="15,20,15,20"> <Border BorderBrush="White" BorderThickness="4" Width="108" Height="88"> <Image Source="cat.jpg" Height="80" Width="100" Stretch="Fill"></Image> </Border> </StackPanel> <StackPanel Margin="0,20,0,20"> <Label Content="Purushottam Rathore" FontSize="15" Foreground="Navy" /> <Label Content="India" FontSize="15" Foreground="Navy"/> </StackPanel> </StackPanel> </DockPanel> </Border></Grid></Window>