using System;

new Program();

partial class Program
{
    [ThreadStatic]
    static int Value;

    public Program()
    {
        // Put this expression in the Watch window: tls_Program::__THREADSTATICINDEX.Get()->Value
        // "tls" is the name of the assembly.
        // "Program" is the containing type
        // "Value" is the name of the threadstatic
        Value = 123;
        Value = 456;
    }
}