I am trying to create a filename in a class that is part of a data collection program. The verbatim construct works properly in the main program. However in the class method, trying to create a string using:

String teststring = @"\test stuff\;

creates the string \\test stuff\\

I also tried string teststring = "\\ test stuff\\; but got the same result.

Included below is a simple test program I put together to see what is happening that duplicates the problem.
Code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace String_Test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            NewClass.stringTest();
            string test = @"/this is a test/";
            test = test + "more string";
            test = '/' + "more string";
            int a = 1;

        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace String_Test
{
    static class NewClass
    {
        static string filename;

        public static void stringTest()
        {
            filename = @"\this is a test\";
            int a = 1;

        }
    }
}
The string in Form1.cs is created properly but the string in the class has the extra / issue. Any ideas of why this would be happening. I am using WinForms and added the class using the add option on the solution drop down menu.

Appreciate any help.