How to easily convert linq result to <T> business object collection

Question

I have a collection of business objects

I would like to filter strings using linq, but noticed that it returns IEnumerable, which cannot be dropped then in my BOC

For example, I can’t do it

BOC <Client> bocCLients = (BOC <Client>) 
                          from C in ClientsColl where C.ClientId == 100 select C

I decided that by cyclizing using linq results and adding the returned object to my original collection.

I wonder if there is an easier way?

Answer 1

var bocCLients = ClientsColl.Where(c => c.ClientId == 100).ToList();

or

var bocCLients = new BOC<Client>(ClientsColl.Where(c => c.ClientId == 100));

Edit Or extension AddRange is possible

public static void AddRange<T>(this ICollection<T> colSource, IEnumerable<T> collection)
        {
            if (colSource is List<T>)
                ((List<T>)colSource).AddRange(collection); //If List use build in optimized AddRange function
            else
            {
                foreach (var item in collection)
                    colSource.Add(item);
            }
        }

Answer 2

. , , ClientsColl Client. foreach . .

, :

 public static BOC<T> ToBOC<T>(this IEnumerable<T> sourceCollection)
 {
     var boc = new BOC<T>();
     foreach (T item in sourceCollection)
     {
         boc.Add(item);
     }
     return boc;
 }

, :

BOC<Client> bocClients =
(
    from C in ClientsColl
    where C.ClientID == 100
    select C
).ToBOC();

ICollection, , Cast , , BOC ICollection, :

public static TCollection ToICollection<T, TCollection>(this IEnumerable<T> sourceCollection)
        where TCollection : ICollection<T>, new()
    {
        TCollection col = new TCollection();
        foreach (T item in sourceCollection)
        {
            col.Add(item);
        }
        return col;
    }

:

BOC<Client> bocClients2 =
(
    from C in ClientsColl
    where C.ClientID == 100
    select C
).ToICollection<Client, BOC<Client>>();

? , .