Converting a SecureString object to byte array in .net

Hi

We are using SecureString to store passwords in the memory. However, I didn't find any secured way to convert the SecureString to the byte array. Is there a way to do this?

The idea is that i do not want to get the byte array via converting SecureString->String->byte array as string is immutable, but byte array can be easily cleared from memory after the work is done.

Thanks