using System;
using System.IO;
using System.Windows.Forms;

public class FileManager : Form
{
    private Button btnCreateFile;
    private Button btnDeleteFile;
    private TextBox txtFilePath;

    public FileManager()
    {
        InitializeComponent();
    }

    private void InitializeComponent()
    {
        this.btnCreateFile = new Button { Text = "Create File" };
        this.btnDeleteFile = new Button { Text = "Delete File" };
        this.txtFilePath = new TextBox { PlaceholderText = "Enter file path here" };

        this.Controls.Add(this.btnCreateFile);
        this.Controls.Add(this.btnDeleteFile);
        this.Controls.Add(this.txtFilePath);

        this.btnCreateFile.Click += BtnCreateFile_Click;
        this.btnDeleteFile.Click += BtnDeleteFile_Click;
    }

    private void BtnCreateFile_Click(object sender, EventArgs e)
    {
        string path = txtFilePath.Text;
        if (!File.Exists(path))
        {
            File.Create(path).Dispose();
            MessageBox.Show("File created successfully!");
        }
        else
        {
            MessageBox.Show("File already exists.");
        }
    }

    private void BtnDeleteFile_Click(object sender, EventArgs e)
    {
        string path = txtFilePath.Text;
        if (File.Exists(path))
        {
            File.Delete(path);
            MessageBox.Show("File deleted successfully!");
        }
        else
        {
            MessageBox.Show("File does not exist.");
        }
    }

    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new FileManager());
    }
}

[TestFixture]
public class FileManagerTests
{
    [Test]
    public void TestCreateAndDeleteFile()
    {
        string testFilePath = "testfile.txt";
        
        // Create File
        File.Create(testFilePath).Dispose();
        Assert.IsTrue(File.Exists(testFilePath));
        
        // Delete File
        File.Delete(testFilePath);
        Assert.IsFalse(File.Exists(testFilePath));
    }
}