Hi

How could I make this code more generic in the sense that the Dictionary key could be a different type, depending on what the user of the library wanted to implement? For example someone might what to use the extension methods/interfaces in a case where there "unique key" so to speak for Node is actually an "int" not a "string" for example.

public interface ITopology
{
    Dictionary<string, INode> Nodes { get; set; } 
}

public static class TopologyExtns
{
    public static void AddNode(this ITopology topIf, INode node)
    {
        topIf.Nodes.Add(node.Name, node);
    }
    public static INode FindNode(this ITopology topIf, string searchStr)
    {
        return topIf.Nodes[searchStr];
    }
}

public class TopologyImp : ITopology
{
    public Dictionary<string, INode> Nodes { get; set; }

    public TopologyImp()
    {
        Nodes = new Dictionary<string, INode>();
    }
}