URI case sensitivity

[Daniel EXBN]

I am downloading a file (if it exists) via Ftp, now problem is that if for example the input address is "http://google.com/por/test.zip" and the actual address is "http://google.com/Por/test.zip", then i get throw exception of file not exist..

So, how can i disable Uri case sensitive and make it case-insensitive ?

Thanks in advance.