C# :: Fetch Column Value From Datatable To Compare

I am getting a excel sheet in datatable with some column "Program,Response,T,Timein".There is 3 condition for filtering datatable.

1.fetch unique program.so i got dis.
2.T not equal to "B". I also got dis.
3.Response should be > 5000. I also got dis data in datatable.

Now in Datatable I have same program name presented 3 times with response>5000 nd T<>B.Now I want to fetch only the maximum respnse among 3 of them. so every time my program should be change and for that program I need to pickup max response so How can I do this? for the same I put two loops

for (int i = 0; i < DataFilter.Rows.Count; i++) {
DataRow dr = DataFilter.Rows[i];
DataView dv2 = new DataView();

[Code]....