DbResXConverter.ImportResourceFile

Imports an individual ResX Resource file into the database

public bool ImportResourceFile(string FileName,
	string ResourceSetName,
	string LocaleId);

FileName
Full path to the the ResX file

ResourceSetName
Name of the file or for local resources the app relative path plus filename (admin/default.aspx or default.aspx)

LocaleId
Locale Id of the file to import. Use "" for Invariant