private void IncomesSearching() { var x = IIncomes.Where(item => (item.Concept.ToUpperInvariant().Contains(Searching.ToUpperInvariant())) || (item.TypeIncome.ToString().ToUpperInvariant().Contains(Searching.ToUpperInvariant())) || (item.Month.ToUpperInvariant().Contains(Searching.ToUpperInvariant())) ).ToList(); IIncomes.Clear(); foreach (var item in x) { IIncomes.Add(item); } if (string.IsNullOrEmpty(Searching)) { GetIncomes(); } }