take backup of selected tables of database using C #

Question

I want c# window application to take backup of Database with selected table (not all table).

example if My DB name is Student and it contains 4 table a,b,c,d. Then I want to create BackUp of Student Database having any number of selected table ie either a and b, or only a and so on.

The backup must contain all the constraints ie primary key, identity or foreign key as in original Table. 

Almost Design is given below-