Collection.ToList().Remove(x);
private ReadOnlyCollection<Post> Remove(ReadOnlyCollection<Post> ROCWall, int index)
{
List<Post> pist = new List<Post>();
for (int i = 0; i < ROCWall.Count; i++)
{
if (i != index) pist.Add(ROCWall[i]);
}
ReadOnlyCollection<Post> value = new ReadOnlyCollection<Post>(pist);
return value;
}