GenericLauncher.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using Flurl;

namespace ConsoleApp1
{
    public class Launcher
    {
        public Launcher()
        {
            AdditionalParameters = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
        }
        public string ActionName { get; set; }

        [JsonConverter(typeof(DictionaryConverter))]
        public Dictionary<string, object> AdditionalParameters { get; set; }

        public bool TryGetValue<T>(string key, out T value)
        {
            value = default;
            try
            {
                var status = AdditionalParameters.TryGetValue(key, out var extracted);

                if (status && CanChangeType(extracted, typeof(T)))
                    value = (T)Convert.ChangeType(extracted, typeof(T));
                else
                    return false;
                return status;
            }
            catch (Exception)
            {
                return false;
            }
        }

        public string AbsolutePath => $"{ActionName}".SetQueryParams(AdditionalParameters);

        public static bool CanChangeType(object value, Type conversionType) => (conversionType == null || value == null) ? false : value is IConvertible;
    }
}