Use Func as filters of LINQ

For example

/// Get public IQueryable<ChtAlarmEvent> GetList(Func<ChtAlarmEvent, bool> filter) { var entities = this._dbContext.ChtAlarmEvents.Where(filter).AsQueryable(); return entities; }

Unit Test

[TestMethod] public void TestGetList() { using (var da = new ChtAlarmEventDAL(chtContext)) { var entities = da.GetList(x => x.Severity == Severity.Critical.ToString()); foreach (var data in entities){ Debug.WriteLine("UUID : " + data.UUID); } entities = null;     } }