0.9.0

RelayCommand.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Windows.Input;
+
+namespace HearingProtector;
+
+public sealed class RelayCommand : ICommand
+{
+    private readonly Action _execute;
+    private readonly Func<bool>? _canExecute;
+
+    public RelayCommand(Action execute, Func<bool>? canExecute = null)
+    {
+        _execute = execute;
+        _canExecute = canExecute;
+    }
+
+    public event EventHandler? CanExecuteChanged;
+    public bool CanExecute(object? parameter) => _canExecute?.Invoke() ?? true;
+    public void Execute(object? parameter) => _execute();
+    public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+}