public void AddDistrict(int districtId)
{
if (!DistrictIds.Contains(districtId))
{
var a = new int[DistrictIds.Length + 1];
DistrictIds.CopyTo(a, 0);
a[DistrictIds.Length] = districtId;
DistrictIds = a;
}
}
public void RemoveDistrict(int districtId)
{
if (DistrictIds.Contains(districtId))
{
var a = new int[DistrictIds.Length - 1];
int index = 0;
foreach (var d in DistrictIds)
{
if (d != districtId)
{
a[index++] = d;
}
}
DistrictIds = a;
}
}