Variable of type Data Table (DT1) = DT.AsEnumerable.Where(Function(x) Not x(0).ToString.Equals("1.1")).CopyToDataTable
It returns the data table contains any value beside 1.1 to DT1. If there are no, it simply gives an exception that you can handle using Try Catch block. In the catch block you can take a boolean variable set to True
This gives an idea, if this variable is set to True, that means there are value other than 1.1 in that column, else no