WPF-Base/WPF基础-1/MainWindow.xaml.cs

using System.Windows;
using System.Windows.Media;

namespace WPF基础_1;

/// <summary>
///     Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        var brush = new LinearGradientBrush();

        var gradientStop1 = new GradientStop
        {
            Offset = 0,
            Color = Colors.Red
        };
        brush.GradientStops.Add(gradientStop1);

        var gradientStop2 = new GradientStop
        {
            Offset = 0.5,
            Color = Colors.Indigo
        };
        brush.GradientStops.Add(gradientStop2);

        var gradientStop3 = new GradientStop
        {
            Offset = 1,
            Color = Colors.Violet
        };
        brush.GradientStops.Add(gradientStop3);

        Grid.Background = brush;
    }
}