Make sure Temp folder is exist in the projects root folder.

Yes you need to create the Temp folder.

Else you need to add the below code for Create folder if not present.

C#

//If Directory not present, create it.
if (!Directory.Exists(Server.MapPath("~/Temp/")))
{
    Directory.CreateDirectory(Server.MapPath("~/Temp/"));
}

VB.Net

'If Directory not present, create it.
If Not Directory.Exists(Server.MapPath("~/Temp/")) Then
    Directory.CreateDirectory(Server.MapPath("~/Temp/"))
End If