System Threading C# by API

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime;
using System.Runtime.CompilerServices;
using System.Security;
using System.Threading;
using System.Text;
public class MainClass
{
    public static void Main()
    {
        LocalDataStoreSlot slot = Thread.AllocateDataSlot();
        Thread.SetData(slot, 63);
        int slotValue1 = (int)Thread.GetData(slot);
        Console.WriteLine(slotValue1);
    }
}