Added .NET 5.0 and restructured the repository. (#47)

src/NotifyIconWpf.Sample.ShowCases/Tutorials/06 - Commands/ShowMessageCommand.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Windows;
+using System.Windows.Input;
+
+namespace NotifyIconWpf.Sample.ShowCases.Tutorials
+{
+    /// <summary>
+    /// A simple command that displays the command parameter as
+    /// a dialog message.
+    /// </summary>
+    public class ShowMessageCommand : ICommand
+    {
+        public void Execute(object parameter)
+        {
+            MessageBox.Show(parameter.ToString());
+        }
+
+        public bool CanExecute(object parameter)
+        {
+            return true;
+        }
+
+        public event EventHandler CanExecuteChanged;
+    }
+}