/// <summary>
/// Checks if the node exists
/// </summary>
/// <param name="node">the node to check</param>
/// <returns>wether the node exists or not</returns>
private bool Exists(ISingleLinkNode <T> nodeToCheck)
{
if (FirstNode == null)
{
return(false);
}
var node = FirstNode;
do
{
if (node == nodeToCheck)
{
return(true);
}
node = node.Next;
} while (node != FirstNode);
return(false);
}
/// <summary>
///
/// </summary>
/// <param name="node"></param>
/// <returns></returns>
private T Remove(ISingleLinkNode <T> node)
{
//The list is empty
if (FirstNode == null)
{
return(default);
