c# - Check that a given date does not lie between two existing dates inside a datatable -


i have 1 table can store student leave start date , end date so:

studentid   age   startdate   enddate  1           14    5/05/2013   7/05/2013    4           17    4/04/2012   8/10/2012

i need check see if new leave applied doesn't fall in range of leave arranged student. example, student id = 1, should not able apply leave starts on 6/05/2013.

i'm using c# , looking solution uses sql or linq.

normal sql select count(*) table studentid = 'parameterid' , startdate <= 'parameter_startdate' , enddate <='parameter_ensdate';


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