Write program in c#

Input into this app are 2 different sets of data as text files

Region,Country,Item Type,Order Priority,Order ID,Order Date,Ship Date,Units Sold,Unit Price,Unit Cost

Asia,Laos,Vegetables,L,844532620,20-Feb-11,20-Mar-11,4825,154.06,90.93

Asia,China,Baby Food,C,564251220,10-Apr-17,12-May-17,3330,255.28,159.42

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Region,Country,Item Type,Sales Channel,Order Priority,Order Date,Order ID,Ship Date,Units Sold,Unit Price,Unit Cost,Total Revenue,Total Cost,Total Profit

Sub-Saharan Africa,Chad,Office Supplies,Online,L,1/27/2011,292494523,2/12/2011,4484,651.21,524.96,2920025.64,2353920.64,566105

Europe,Latvia,Beverages,Online,C,12/28/2015,361825549,1/23/2016,1075,47.45,31.79,51008.75,34174.25,16834.5

Create a front end that all the user to provide a CSV list of regions

(E.g., Europe,Asia or All) If bad input such as Asia,All output error message

Ship Year can be a year or All (e.g 1997,1998 or All)

Results are shown by year

Put results here: Such as

Region Total Units Total Revenue

Asia 211 $12111.00

Europe 111 $1200.00

Total 333 $13311.00

ACME Sales Data Region Ship Year Show Sales Results Here