c# compilation is not working. the same code in java works fine.

Java 8 Solution:

static SinglyLinkedListNode insertNodeAtHead(SinglyLinkedListNode llist, int data) {
    SinglyLinkedListNode newNode = new SinglyLinkedListNode(data);
    if(llist != null)
        newNode.next = llist;
    llist = newNode;
    return llist;
}

Great stuff, i am very imppressed with your amazing work, now could you please have a look on my site and let me know how can i use this code on my site please?>

little bit confusing for beginner I have face the same issue but dont' worry guys take a time and understand the whole code you will know how to work. for me i do not understand what's happing in llist and why tail is create but after read line by line. I have understood the code and end of that. I have solve the problem.

this is my c++ solution :

SinglyLinkedListNode* insertNodeAtHead(SinglyLinkedListNode* llist, int data) {

SinglyLinkedListNode* newNode = new SinglyLinkedListNode(data);

if(llist == nullptr){
    llist =  newNode;
}
else{
    newNode->next = llist; 
    llist = newNode;
}   
return llist;   

}