This is a book about vb.you could learn this from this book

				
				
				
								
					if File.Exists("C:\Wrox\Hello.Txt") then
						Response.Write( "C:\Wrox\Hello.Txt file exists")
					else
						Response.Write( "C:\Wrox\Hello.Txt file does not exist")
					end if
				
				
					dim myfile as FileInfo
				
					myfile = new FileInfo("C:\Wrox\Hello.Txt")
				
					if myfile.Exists = true then
						Response.Write( "C:\Wrox\Hello.Txt file exists")
						Response.Write( "Created: " & myfile.CreationTime )
					else
						Response.Write( "C:\Wrox\Hello.Txt file exists does not exist")
					end if
				
				
				
				%>