how to i increment months in c# windows application

Question

hi,

 

I am creating banking application in windows application.

In that i have created loan application with date and time, when the customer had took loan.

suppose take as todays date (14/7/2020). what is my qution means if customer had pay themonthly loan amount,

when cuctomer is going to pay assume next month  i.e(14/8/2020) okay  so i am struck in getting next month date that is (14/9/2020) how to i increment this month in c#.Upto loan amount get zero need to increment months.

Can any one help me.