Using multiple strings within the path to Write to Text File [closed]

In Unity3D, How would I use something like this: path = "C:\Users\Jonathan\Documents\FileData" + fileName + ".txt"; so I can make a for loop and create several text files under desired path?

The loop looks like this currently:

named = namesAsset.text.Split ('\n');
sliced = statAsset.text.Split ('\n');
for (int i = 0; i < named.Length; i++) {
    fileName = named[i].ToLower();
    path = "C:\Users\Jonathan\Documents\FileData" + fileName.Substring(1) + ".txt";
    File.WriteAllText(path, sliced[i]);
    Debug.Log (named[i]+".txt");
}

But there is a problem: They won't accept this! It spits out the error that the name has an invalid char.

Full script:

using UnityEngine;
using UnityEditor;
using System.IO;
using System.Text;
using System;

public class SplitPage : ScriptableWizard {

    public TextAsset statAsset;
    public TextAsset names;

    public string[] named = new string[151];
    public string[] sliced = new string[151];
    public string path;

    public string fileName;

    [MenuItem("GameObject/SlicePage")]
    static void CreateWizard() {
        ScriptableWizard.DisplayWizard<SplitPage>("Split Text File", "Create");
    }

    void OnWizardCreate() {
        named = names.text.Split ('\n');
        sliced = statAsset.text.Split ('\n');
        for (int i = 0; i < named.Length; i++) {
            fileName = named[i].ToLower();
            path = "C:\Users\Jonathan\Documents\FileData" + fileName.Substring(1) + ".txt";
            File.WriteAllText(path, sliced[i]);
            Debug.Log (named[i]+".txt");
        }

    }
}