C# 讀取txt文件

//按鈕點擊選擇文件
private void btnFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog fileDialog = new OpenFileDialog();
            fileDialog.Multiselect = true;
            fileDialog.Title = "請選擇文件";
            fileDialog.Filter = "所有文件(*.*)|*.*";
            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                string file = fileDialog.FileName;
                //讀取txt文件每行的內容以數組形式保存
                string[] strs2 = File.ReadAllLines(@file, Encoding.Default);
                
            }

        }