static void Main(string[] args)
{
ActionTest target = new ActionTest();
MethodTest instance = new MethodTest();
target.DoExpressionAction(() => instance.Method1().Method2());
Console.ReadLine();
}
static void Main(string[] args)
{
ActionTest target = new ActionTest();
target.DoAction(() => Console.WriteLine("Action"));
target.DoExpressionAction(() => Console.WriteLine("ExpressionAction"));
Console.ReadLine();
}