Ensure that the target path exists and if a file exists there, it is not readonly or hidden. WARNING: Can throw if target "Filename" calls for a parent directoryname that is already used as a filename by a non-directory. E.g. EnsureOverwriteable(C:\io.sys\filename.txt); would throw.

public static void EnsureOverwritable(
	string sFilename
)

Public Shared Sub EnsureOverwritable ( 
	sFilename As String
)

public:
static void EnsureOverwritable(
	String^ sFilename
)