asp.net creates a folder in the root directory of the website

Suppose you want to create a folder hovertree in the root directory of the asp.net website, the C# code is as follows:

string m_keleyiFolderName = Server.MapPath("/hovertree");
if (Directory.Exists(m_keleyiFolderName))
{
//文件夹已经存在
return;
}
else
{
try
{
Directory.CreateDirectory(m_keleyiFolderName);
//创建成功
}
catch (Exception ex)
{
//创建失败 ,原因： ex.Message
}
}