public AsyncCommand(Func <object, Task> command, Func <object, bool>?checker, ExecutableKey?key = null)
{
Command = command;
Checker = checker;
if (key == null)
{
Key = new ExecutableKey();
}
else
{
Key = key;
}
Key.StateChanged += Key_StateChanged;
}
private void Key_StateChanged(ExecutableKey arg1, bool arg2) => CanExecuteChanged(this, new EventArgs());
