/// <summary>
/// Methods
/// </summary>
private void PerformFiltering()
{
if (_filter == null)
{
_filter = string.Empty;
}
var lowerCaseFilter = Filter.ToLowerInvariant().Trim();
var result =
_allCustomers.Where(d => d.FullName.ToLowerInvariant().Contains(lowerCaseFilter)).ToList();
var toRemove = CustomerList.Except(result).ToList();
foreach (var x in toRemove)
{
CustomerList.Remove(x);
}
var resultCount = result.Count;
for (int i = 0; i < resultCount; i++)
{
var resultItem = result[i];
if (i + 1 > CustomerList.Count || !CustomerList[i].Equals(resultItem))
{
CustomerList.Insert(i, resultItem);
}
}
}