interface ITest{

        /// <summary>
        /// Test Message.
        /// </summary>
        /// <returns>A Task representing the asynchronous operation.</returns>
        Task Test();

}

class Test : ITest{

public async Task Test(){
 return Task.CompletedTask();
}

}

class Test : ITest{

public Task Test(){
 return Task.CompletedTask();
}

}