static void Main(string[] args)
{
Graph graph = new Graph();
//Nodes
graph.AddNode("A");
graph.AddNode("B");
graph.AddNode("C");
graph.AddNode("D");
graph.AddNode("E");
graph.AddNode("F");
//Connections
graph.AddConnection("A", "B", 20);
graph.AddConnection("A", "C", 1);
graph.AddConnection("B", "D", 5);
graph.AddConnection("D", "C", 1);
graph.AddConnection("C", "E", 3);
graph.AddConnection("C", "F", 10);
graph.AddConnection("D", "F", 2);
var distances = Dijkstra.CalculateDistances(graph, "A"); // Start from "A"
Console.WriteLine(distances);
}