c# i need the complete code fast

3. You have been asked to build an application that enables customers to order tickets for events. Part of the application needs to enable a customer to enter his details, specify an event, and select the number of tickets required. A customer has a privilege level (Standard, Premium, Executive, or Premium Executive), and the higher this level the more tickets a customer can order. (Standard customers can order at most two tickets for an event, Premium customers can order four tickets, Executive customers can order eight tickets, and Premium Executive customers can order ten tickets). You decide to create a prototype form like the one shown in the following figure. (40 points) Figure User Interface for Exercise 3 You need to ensure that the user's input is valid and consistent. Specifically, the customer must do the following: - Select an event. The prototype application uses a hard-coded set of events. - Input a customer reference number. The application should verify this reference number to start with the first letter of the Privilege Level followed by 4 numbers. - Specify a privilege level. - Pick a number of tickets greater than 0 and less than or equal to the value tha the customer's privilege level allows. When the user has completed entering data, the user clicks the Purchase item in th File menu. After validating the data the application displays a message box confirm he user's input or shows an error message if anything does not match the criteria