内容如下：

/// <summary>
/// 写日志
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="type">类型</param>
/// <param name="content">内容</param>
public static void WriteLogs(string fileName, string type, string content)
{
    string path = AppDomain.CurrentDomain.BaseDirectory;
    if (!string.IsNullOrEmpty(path))
    {
        path = AppDomain.CurrentDomain.BaseDirectory + fileName;
        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }
        path = path + "\\" + DateTime.Now.ToString("yyyyMMdd");
        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }
        path = path + "\\" + DateTime.Now.ToString("HH") + ".txt";
        if (!File.Exists(path))
        {
            FileStream fs = File.Create(path);
            fs.Close();
        }
        if (File.Exists(path))
        {
            StreamWriter sw = new StreamWriter(path, true, System.Text.Encoding.Default);
            sw.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + " >>> " + type + " >>> " + content);
            sw.WriteLine("-----------------华丽的分割线-----------------------");
            sw.Close();
        }
    }
}

调用方法：

WriteLogs("Logs", "Error", e.Message + " >>> " + e.StackTrace);