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ArryList al_list=new ArryList();
al_list.add(Convert.ToInt64(1));
al_list.add(Convert.ToInt64(1));
Int64[] id_list=al_list.ToArray(typeof(Int64));
ArrayList list = new ArrayList();
list.Add(1);
list.Add(2);
Int64[] id_list = new Int64[list.Count];
for (int i = 0; i < id_list.GetLength(0); i++)
{
id_list[i] = (Int64)list[i];
}
ArrayList list = new ArrayList();
list.Add(1);
list.Add(2);
Int64[] values = list.ToArray().Select(o => Convert.ToInt64(o)).ToArray();
Int64[] id_list = al_list.Cast<object>().Select(t => Convert.ToInt64(t)).ToArray();
Int64[] id_list = new long[al_list.Count];
al_list.ToArray(typeof(int)).CopyTo(id_list, 0);
System.Collections.ArrayList al_list = new System.Collections.ArrayList();
al_list.Add(1);
al_list.Add(2);
Int64[] id_list = al_list.Cast<Int64>().ToArray();