I used this Code and it Worked for me.
DataRow row = dt.AsEnumerable().FirstOrDefault
(r => (DateTime)r["date"] == timeToCompare.Date
& r.Field<string>("plannum") == "0995" &
tp >= r.Field<TimeSpan>("MorningStart") &
tp < r.Field<TimeSpan>("MorningEnd"));
And then using this to get values :
sh_starttime = row["MorningStart"].ToString();
solved What is the equivalent code of SQL query in C# with linq to datatable?