Кто из пользователей открыл определенный файл

using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Windows.Forms;
 
namespace DVKC_SOLO_Excel
{
public partial class Form1 : Form
{
string excelFileName = "2022.xlsx - Excel";
public Form1()
{
InitializeComponent();
textBox1.Enabled = false;
textBox2.Enabled = false;
textBox5.Enabled = false;
textBox7.Enabled = false;
}
 
public void Form1_Load(object sender, EventArgs e)
{
this.Opacity = 0;
this.ShowInTaskbar = false;
Datums1.Start();
Laiks1.Start();
textBox1.Text = string.Format("{0}\\{1}", Environment.UserDomainName, Environment.UserName);
if (textBox1.Text == "PC\\Aa")
{
textBox2.Text = "A A";
}
else if (textBox1.Text == "PC\\Bb")
{
textBox2.Text = "B B";
}
else if (textBox1.Text == "PC\\Cc")
{
textBox2.Text = "C C";
}
else if (textBox1.Text == "PC\\Dd")
{
textBox2.Text = "D D";
}
else if (textBox1.Text == "PC\\Ee")
{
textBox2.Text = "E E";
}
timerbutt1.Enabled = true;
}
 
private void Date1_Tick(object sender, EventArgs e)
{
DateTime dateTime = DateTime.Now;
Datums.Text = dateTime.ToShortDateString();
}
 
private void Time1_Tick(object sender, EventArgs e)
{
DateTime dateTime = DateTime.Now;
Laiks.Text = dateTime.ToLongTimeString();
}
 
void button2_Click(object sender, EventArgs e)
{
label9.Text = Date.Text + "\n" + Time.Text + " " + textBox2.Text + " " + "Open" + " " + textBox5.Text + " File";
}
 
private void button5_Click(object sender, EventArgs e)
{
label11.Text = Time.Text + " " + textBox2.Text + " " + "Close" + " " + textBox7.Text + " File";
}
 
void timerbutt1_Tick(object sender, EventArgs e)
{
var processes = from p in Process.GetProcessesByName("excel")
select p;
foreach (var process in processes)
{
if (process.MainWindowTitle == excelFileName)
{
listBox1.Items.Add(process.MainWindowTitle);
}
if (listBox1.Items.Contains("2022.xlsx - Excel"))
{
timerbutt1.Enabled = false;
label9.Text = Date.Text + "\n" + Time.Text + " " + textBox2.Text + " " + "Open" + " " + textBox7.Text + " File";
timerbutt2.Enabled = true;
 
}
}
}
 
void timerbutt2_Tick(object sender, EventArgs e)
{
if (Process.GetProcessesByName("excel").Length > 0)
{
 
}
else
{
timerbutt2.Enabled = false;
listBox1.Items.Clear();
label11.Text = Time.Text + " " + textBox2.Text + " " + "Close" + " " + textBox7.Text + " File";
button1.PerformClick();
}
var processes = from p in Process.GetProcessesByName("excel")
select p;
foreach (var process in processes)
{
if (process.MainWindowTitle == excelFileName)
{
 
}
else
{
timerbutt2.Enabled = false;
listBox1.Items.Clear();
label11.Text = Time.Text + " " + textBox2.Text + " " + "Open" + " " + textBox7.Text + " File";
button1.PerformClick();
}
}
}
 
void button1_Click(object sender, EventArgs e)
{
string fileName = Date.Text + " " + textBox2.Text + " " + "Close  2022" + ".txt";
string path = @"S:\DVKC_DS\0_DVKC DS\DVKC_DATABASES\FS\Excel Open User\" + fileName;
using (StreamWriter stream = new StreamWriter(path, true))
stream.WriteLine(label9.Text + "\n" + label11.Text + "\n");
label9.Text = "";
label11.Text = "";
this.Dispose();
System.Diagnostics.Process.Start(@"S:\DVKC_DS\DVKC SOLO\Program Application\DVKC SOLO Excel\DVKC SOLO Excel\bin\Debug\DVKC SOLO Excel.exe");
}
}
}