help o solve this error

Question

{

foreach (UnitType item in Couseunit)

{

if (item.unit_id == 0)

{

item.unit_id = 1;

item.active = true;

}

}

List<UnitType> Couseunit = new List<UnitType>();

dgCunit.DataSource = Couseunit.Where(x => x.unit_id == 0).ToList();

dgCCCourse.DataSource = Couseunit.Where(x => x.unit_id == 1 & x.active == "Y").ToList();

how can i resolve the error

operator '==' cannot be applied to operand of type bool and string