Captured image by webcam store into perticular sub directory

Question

i have one project i want to save image captured from vebcam and i want to save it in sub directory date wise. like

Images - 27/10/2020.

then how to do it.

i have code like as below.

if (!Directory.Exists(Server.MapPath(MainDir)))
{
    Directory.CreateDirectory(Server.MapPath(MainDir));
}
if (!Directory.Exists(Server.MapPath(MainDir + SubDir)))
{
    Directory.CreateDirectory(Server.MapPath(MainDir + SubDir));
}

MainDir = SubDir + "/" + Path.GetFileName(vImage.ImageUrl);
vImage.ImageUrl = (Server.MapPath(MainDir + SubDir));