Fix for issue #28
Fix for issue #28

Fixing ObjectDisposedException thrown by MD5 provider being used in a
non-threadsafe context.

rickbeerendonk/React.NET,rickbeerendonk/React.NET,SaltyDH/React.NET,chriscamplejohn/React.NET,ShikiGami/React.NET,alexsoftua/React.NET,alexsoftua/React.NET,radnor/React.NET,reactjs/React.NET,ShikiGami/React.NET,SaltyDH/React.NET,radnor/React.NET,rickbeerendonk/React.NET,chriscamplejohn/React.NET,IveWong/React.NET,reactjs/React.NET,reactjs/React.NET,reactjs/React.NET,IveWong/React.NET,alexsoftua/React.NET,IveWong/React.NET,reactjs/React.NET,rickbeerendonk/React.NET,ShikiGami/React.NET,IveWong/React.NET,SaltyDH/React.NET,reactjs/React.NET,chriscamplejohn/React.NET,alexsoftua/React.NET,SaltyDH/React.NET,ShikiGami/React.NET,radnor/React.NET,radnor/React.NET,chriscamplejohn/React.NET