C++ template member variable declaration error - class

Question

I'm new to C++ and learning what Class is and related concept on it.
I faced some Error while practicing making code that contains class.
template <typename T>
class Node{
public:
T data;
Node<T> *link;
Node<T>(T element){
data = element;
link = 0;
}
};
template <typename T>
class LinkedList{
protected:
Node<T> *first;
int current_size;
public:
LinkedList(){
first = NULL;
current_size = 0;
};
T GetSize(){
return current_size;
};
void Insert(T element);
virtual bool Delete(T &element);
void Print();
};
template <typename T>
void LinkedList<T>::Insert(T element){
Node *newnode = new Node(element);
newnode -> link = first;
first = newnode;
current_size++;
}
template <typename T>
bool LinkedList<T>::Delete(T &element){
if (first == 0)
return false;
Node *current = first;
Node *previous = 0;
while(1){
if (current->link == 0){
if (previous)
previous -> link = current -> link;
else
first = first -> link;
break; // Point in which Error Occured
}
previous = current;
current = current -> link;
}
element = current -> data;
delete current;
current_size--;
return true;
}
In "delete" Function, "'current': undeclared identifier Error Occured.
I think I declared and defined it at the first of the function (Node* current = this->first).
I don't know why error happened.
Thanks for your help.

Answer 1

Just replace all Node usages with Node<T> and it should compile.
Explanation:
Each class that declares a template (template <typename T>) is familiar with it. Other classes aren't. Even if the template is declared with the same literal T, there isn't a conncetion between two different classes' templates.