gistfile1.bas

        overlaps = From et In DataSetManager.employeTache.Rows Where _
                   (et IsNot ModifiableRow AndAlso modifyingDatabaseTask = False) And _
                   et.item("noEmploye") = noEmploye And _
        ((startTime >= et.item("dateDebutEmployeTache") And startTime <= et.item("dateFinEmployeTache")) OrElse _
        (endTime >= et.item("dateDebutEmployeTache") And endTime <= et.item("dateFinEmployeTache")) OrElse _
        (et.item("dateDebutEmployeTache") >= startTime AndAlso et.item("dateFinEmployeTache") <= endTime)) _
        Select et
        If (overlaps.Count > 0) Then
            Return True
        End If
        Return False