TestClass必须是public的

运行一个测试类遇到一下问题：

namespace TestSample.Sample
{
    [TestClass]
    class CynthiaTest
    {
        [TestMethod]
        public void UITestSample()
        {
            DemoAPIs.SendWinKey();
            DemoAPIs demo = new DemoAPIs();
            demo.LaunchMiCity();
        }

    }
}

编译运行会遇到如下error：

Result Message:    UTA004: Illegal use of attribute on TestSample.Sample.CynthiaTest.UITestSample. The TestMethodAttribute can be defined only inside a class marked with the TestClass attribute.

解决方法：在Class前面加上public

因为：test class必须都是public的因为最终调用这个测试类的之外的一些