10 rules to be cross-platform and .NET compatible

• Do not use absolute paths (e.g. c:\program files\yourapplication)
• It's better to use GTK# than System.Windows.Forms.
• Do only p/invoke against native libaries if really needed. Make sure, the library is available for Unix and Windows.
• Do not read Registry keys, trough Microsft.Win32.Registry, that are maintained by Windows. (Run, RunServices, get system information, etc.)