//if collections are equal, cleaning will not occur
private static async Task <bool> СollectionEqualityTest <T>(
this ControlCollection controlCollection,
IList <T> newEntity,
CancellationToken token)
where T : class, IEntity
{
return(await Task <bool> .Factory.StartNew(() =>
{
var countSameValues = controlCollection.Count == newEntity.Count()
? newEntity.Count(nE => !controlCollection.IsContainControl <T>(nE.Id))
: -1;
Console.WriteLine($"countSameValues - {countSameValues}");
return countSameValues == 0;
}, token));
}