Help! Class problem.

Hey guys, im trying to create a priority queue in C#. In my case i gonna need a queue of vector3, soo i start creating a class called Charge with have a vector3 and a double for priority, then i create the class PriorityQueue that is a list of charge. You can follow the code below:

 public  class Charge{

 public Vector3 vetor = new Vector3();
 public double priority = new double ();


 public Charge(Vector3 a, double b){
     vetor = a;
     priority = b;
 }
 }


  public class PriorityQueue<Charge> where Charge : new (){

 private List<Charge> elements = new List<Charge>();
 Charge t ;

 public int Count
 {
     get { return elements.Count; }
 }

 public void Enqueue(Vector3 item, double priority)
 {
     t = new Charge(item, priority);
     elements.Add(t);

 }

 public Charge Dequeue()
 {
     int bestIndex = 0;
     Charge bestItem = new Charge();

     for (int i = 0; i < elements.Count; i++) {
         if (elements[i].priority < elements[bestIndex].priority) {
             bestIndex = i;
         }
     }

     bestItem = elements[bestIndex].vetor;
     elements.RemoveAt(bestIndex);
     return bestItem;
 }
 }

However i geting 3 errors: error CS0417: Charge': cannot provide arguments when creating an instance of a variable type error CS1061: Type Charge' does not contain a definition for priority' and no extension method priority' of type Charge' could be found. error CS1061: Type Charge' does not contain a definition for vetor' and no extension method vetor' of type `Charge' could be found.

The thing is i don't get it, why i can't access the methods of the class i just created? did i made something wrong? can someone explain me plis. Thx