How to execute code at specific time?

Question

C++ / C#

var a = DateTime.Parse("17:45");
                if (DateTime.Now == a);
            {
                
                MessageBox.Show("1");
            }

For example, you need to show the message box at 17:45. If the current time on the computer matches var "a", then the code is executed. The problem is that the code is executed anyway, even if the time doesn't match. Thank you in advance.

Answer 1

You can try that.

if(DateTime.Now.Hour == 21)
            {
                MessageBox.Show("Test");
            }

Answer 2

DateTime date = DateTime.Parse("17:45");
Task.Delay(date - DateTime.Now ).ContinueWith(MessageBox.Show("1"));

Answer 3

https://www.codeproject.com/Tips/1214782/How-to-Sc...

Answer 4

if (DateTime.Now == a);
Firstly, the semicolon must be removed, and secondly, it is better to do something like this: if ((DateTime.Now - a).TotalSeconds < 1), for example.