PAN card with Asp.Net MVC

Question

HI, I have the small issue Regarding the MVC GRID. The problem is When I enter the details i.e; first name and last name based on the last name I need to generate the Random PAN CARD Number i.e AAAAY0000A in This String first 4 letters I need to generate random letter up to ZZZZ and 5th letter must have come from the SURNAME and remaining 4 digits generate random numbers from 0000 to 9999 n 10th letter must be generated RANDOM IN A Sequence i.e A TO Z ...Can You Please Help me from this Problem???