public void ExceptionTest()
{
Assert.Throws <ArgumentException>(() => new TQueue <string>(-1));
Assert.Throws <ArgumentNullException>(() => new TQueue <Person>(null));
Assert.Throws <ArgumentException>(() => new TQueue <int>(-1));
Assert.Throws <ArgumentException>(() => queueCust1.Dequeque());
Assert.Throws <ArgumentException>(() => queueCust2.Peek());
}