C# Single-Assembly Multilanguage App - Resources not being loaded properly - visual-studio-2010

Question

I´m developing a simple C# .NET 4.0 application, and want to have it localized in several languages. However, the satellite assemblies created for localization (i.e. the de/MyApp.resources.dll) would trash its simplicity by having to drag around those dlls and their folders.
That´s why I looked for a means to include those dll into the main (and only) assembly, so only the executable needed to be sent to the end user. I came across this very promising question and gave it a shot.
After adopting the class in the suggested solution, I replaced all occurences I could find of ResourceManager with SingleAssemblyResourceManager in the .Designer.cs files using FART in a pre-build command:
fart.exe "$(ProjectDir)*.Designer.cs "System.ComponentModel.ComponentResourceManager" "SingleAssemblyComponentResourceManager"
Then I created a batch file like so:
"%ProgramFiles%\ILRepack.exe" /t:exe /out:%1TempProg.exe %1%2.exe %1es\%2.resources.dll
IF %ERRORLEVEL% NEQ 0 GOTO END
"%ProgramFiles%\ILRepack.exe" /t:exe /out:%1TempProg2.exe %1TempProg.exe %1de\%2.resources.dll
IF %ERRORLEVEL% NEQ 0 GOTO END
"%ProgramFiles%\ILRepack.exe" /t:exe /out:%1SA_%2.exe %1TempProg2.exe %1tr\%2.resources.dll
IF %ERRORLEVEL% NEQ 0 GOTO END
del %1%2.exe
del %1%2.pdb
del %1TempProg.exe
del %1TempProg.pdb
del %1TempProg2.exe
del %1TempProg2.pdb
rmdir %1es /S /Q
rmdir %1de /S /Q
rmdir %1tr /S /Q
:END
And called it from a post-build command:
$(ProjectDir)postbuild.bat $(TargetDir) $(TargetName)
Note: TargetName and ProjectName are the same in this case.
Built it, successfully, but it´s not working as expected... The form should be displayed in the InstalledUICulture language (if available). To accomplish this, I added this line before InitializeComponent():
Thread.CurrentThread.CurrentUICulture = CultureInfo.InstalledUICulture;
Which did the trick in the "standard" version of the program. Not anymore. However! I also added a little control to change the language at runtime, via a ComboBox. Code is as follows:
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboBox1.SelectedItem.ToString() == "English (Default)")
{
Thread.CurrentThread.CurrentUICulture = new CultureInfo("en");
ChangeLanguage("en");
}
else if (comboBox1.SelectedItem.ToString() == "Español")
{
Thread.CurrentThread.CurrentUICulture = new CultureInfo("es");
ChangeLanguage("es");
}
else if (comboBox1.SelectedItem.ToString() == "Deutsch")
{
Thread.CurrentThread.CurrentUICulture = new CultureInfo("de");
ChangeLanguage("de");
}
else if (comboBox1.SelectedItem.ToString() == "Turkce")
{
Thread.CurrentThread.CurrentUICulture = new CultureInfo("tr");
ChangeLanguage("tr");
}
}
private void ChangeLanguage(string lang)
{
foreach (Control c in this.Controls)
{
SingleAssemblyComponentResourceManager resources = new SingleAssemblyComponentResourceManager(typeof(Form1));
resources.ApplyResources(c, c.Name, new CultureInfo(lang));
if (c.ToString().StartsWith("System.Windows.Forms.GroupBox"))
{
foreach (Control child in c.Controls)
{
SingleAssemblyComponentResourceManager resources_child = new SingleAssemblyComponentResourceManager(typeof(Form1));
resources_child.ApplyResources(child, child.Name, new CultureInfo(lang));
}
}
}
}
And this does change the form language. So the dlls are actually included in the exe. Why then, does InitializeComponent not load the appropriate resources? I checked the Designer code and the ResourceManager had been replaced by SingleAssemblyResourceManager.
Also, other than the form button´s texts I have a strings.resx file per language, for MessageBoxes and whatnot, and that doesn´t seem to work either way. But that might be another question.
I am aware that the original solution was designed for a NET 2.0 environment, and that the ResourceSets are obsolete, but it is my understanding that it should work, even if its not recommended.
Any pointers as to where I should look into would be awesome.

Answer 1

As it turns out, I was eventually able to make it work, modifying slightly the CurrentUIculture line. It would seem the code does not try parental cultures (properly) because if I set it to the generic culture (that is, "de" instead of "de-DE") it works perfectly.
Thread.CurrentThread.CurrentUICulture = new CultureInfo(CultureInfo.InstalledUICulture.TwoLetterISOLanguageName);
I discovered this since it was the only evident difference between the ApplyResources calls from InitializeComponent() and ChangeLanguage().
Now, I do not why this is and there certainly may be a better solution out there, but it´s the only fix I found so far.
The strings part still doesnt work though :/