How to call a procedure from an external class

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C#

VB

So I created a class in C# but the project is in vb.net. I want to call a procedure that is inside that class called main() I have imported the class to the vb.net project but I can not figure out what I am doing wrong... Can anyone explain how I can do that in vb.net?
Here is some of the code in the the class I am using.. The name of the class is TagAPI.dll

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;
using System.Net;
using System.Xml.Linq;
using System.IO;

namespace TagAPI
{
    public class Class1
    {
        //how this works...
        //folder names read by main application and shown in listbox
        //user selects and version gets saved in versionselect.txt
        //(this application)application reads versionselect.txt (-) and reads json and makes arguments and then create a new txt file and run the argument.
        //go back to main app.

          class atomMinecraft
    {
        internal static Dictionary<string, string[]> versionData = new Dictionary<string, string[]>
        {

.
.
.
}




        static void Main()
        {
            //Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData
            string text = System.IO.File.ReadAllText(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "/.minecraft/TagCraftMC Files/Settings/versionselect.txt");

}

Can anyone tell me what I can add in my visual basic application to call the main procedure?