How to prevent duplicate values in a Dictionary in C# .NET

Question

I have a dictionary where values are duplicating.

How do I prevent duplicates in dictionary?

This is my code:

private class GcellGtrx
{
    public Gcell Gcell { get; set; }
    public Gtrx Gtrx { get; set; }
}

Dictionary<int, GcellGtrx> dictionary = new Dictionary<int, GcellGtrx>();

dictionary.Add(gcell.CellId, gcellGtrx);

Answer 1

To check duplicate key, you can use:

dictionary.ContainsKey(gcell.CellId);

and to check duplicate value, you can use:

dictionary.ContainsValue(gcellGtrx);