using System;

using System.Collections.Generic;

using Microsoft.AspNetCore.WebUtilities;

using Microsoft.AspNetCore.Http;

using Microsoft.Extensions.Primitives;

public class Program

{

    public static void Main()

    {

        var url = string.Format("https://{0}",Guid.NewGuid().ToString("D"));

        var exampleUri = new Uri(url);

        var requestUri = QueryHelpers.AddQueryString(exampleUri.AbsoluteUri, new Dictionary<string,string>{

            { "myvar1", 123.ToString() },

            { "myvar2", "hello world" }

        });

        Console.WriteLine(requestUri);

        var exampleUri2 = new Uri("https://example.com/some/path");

        var requestUri2 = QueryHelpers.AddQueryString(exampleUri2.AbsoluteUri, new Dictionary<string,string>{

            { "myvar1", 123.ToString() },

            { "myvar2", "hello world" }

        });

        Console.WriteLine(requestUri2);

        var builder = new UriBuilder

        {

            Port = 5000,

            Host = "example.com",

            Path = "some/path/to/resource",

            Query = QueryString.Create(new Dictionary<string, StringValues>

            {

                ["val1"] = "hello world",

                ["val2"] = "second value",

                ["val3"] = 123.63f.ToString()

            }).ToString()

        };

        Console.WriteLine(builder.Uri.AbsoluteUri);

    }

}