Callbackr: Easy callback class, for all your callback needs!

Callbackr.cs

public static class Callbackr
{
    private static Dictionary<object, Action> callbacks = new Dictionary<object, Action>();
    
    /// <summary>
    /// Adds the specified callback with the specified identifier.
    /// </summary>
    /// <param name="token">The callbacks specified identifier.</param>
    /// <param name="callback">The callback to be added.</param>
    public static void Add(object token, Action callback)
    {
        if (callbacks.ContainsKey(token))
            throw new InvalidOperationException("Token already exists.");

        callbacks.Add(token, callback);
    }
    
    /// <summary>
    /// Removes the specified callback.
    /// </summary>
    /// <param name="token">The callbacks specified identifier.</param>
    public static void Remove(object token)
    {
        if (!callbacks.ContainsKey(token))
            throw new InvalidOperationException("Token does not exist.");
        
        callbacks.Remove(token);
    }
    
    /// <summary>
    /// Executes the specified callback.
    /// </summary>
    /// <param name="token">The callbacks specified identifier.</param>
    public static bool Execute(object token)
    {
        if (callbacks.ContainsKey(token))
        {
            callbacks[token]();
            return true;
        }
        return false;
    }
}