Hello @Rahul_Gavhane
use Filter data table activity, and save the data in different variables Like DT_Rahul
Filter condition is Column 1 contains “Rahul”
Later you can get the count by DT_Rahul.RowCount.toString
(From d In Dt1.AsEnumerable
Group d By k=d("Column2").ToString.Trim Into grp=Group
Let f= grp(0)("Column2").ToString
Select dt.Rows.Add(f,grp.count.ToString)).CopyToDataTable