added some practice examples

20241107/WpfApp1/MainWindow.xaml.cs

@@ -0,0 +1,53 @@
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace WpfApp1
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public static int redvalue = 0, greenvalue = 0, bluevalue = 0;
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        private void redSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
+        {
+            redvalue = Convert.ToInt32(redSlider.Value);
+            SolidColorBrush solidColorBrush = new SolidColorBrush();
+            solidColorBrush.Color = Color.FromArgb(255, (byte)redvalue, (byte)greenvalue, (byte)bluevalue);
+            myrectangle.Fill = solidColorBrush;
+        }
+
+        private void greenSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
+        {
+            greenvalue = Convert.ToInt32(greenSlider.Value);
+            SolidColorBrush solidColorBrush = new SolidColorBrush();
+            solidColorBrush.Color = Color.FromRgb((byte)redvalue, (byte)greenvalue, (byte)bluevalue);
+            myrectangle.Fill = solidColorBrush;
+        }
+
+        private void blueSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
+        {
+            bluevalue = Convert.ToInt32(blueSlider.Value);
+            
+
+            SolidColorBrush solidColorBrush = new SolidColorBrush();
+            solidColorBrush.Color = Color.FromArgb(255, (byte)redvalue, (byte)greenvalue, (byte)bluevalue);
+            myrectangle.Fill = solidColorBrush;
+            
+        }
+
+    }
+}