Alert when date matches with system date(C# windows form app

Question

Dear Friends,

i am working with C# windows form application (with sql), where i need to save the future appointments. Here is the structure, i am saving appoint with AppID, AppName, AppDate, AppAlertDate for date i am using datetime picker. 

for example

AppID= 1

AppName=Interview

AppDate=10/06/2017

AppAlertDate=08/06/2017 

 

AppID=2

AppName=Interview

AppDate=11/06/2017

AppAlertDate=09/06/2017

 

Now what i want is i need to show a alert when my application starts for the first time on the AlertDate Matches with the system date.

can you please help me.

 

Thanks