When you get a message like that, one project is compiling for either 32 or 64 bit and the other project is compiling for the opposite. If the target is "Any CPU", a project will compile so that if the code runs on a 64-bit machine, it'll run as a 64-bit process, and if on a 32-bit machine, as a 32-bit process. To solve this, make sure both projects build as either x64 or x86. Which depends on your requirements, but both projects have to build targeting the same thing. Asking questions is a skill CodeProject Forum Guidelines Google: C# How to debug code Seriously, go read these articles. Dave Kreskowiak

lol , i didn't know it, it's cool to learn something new. I took this username on google with reference to The big Lebowski's movie, i'm pretty sure it's a wrong translation. Perhaps it's dude in english but in french he wants to be called The Duc, what is a total paradox with all of he is. It's true that it could interpreted as something pretentious, i'm happy you understood it was not at all for this reason. It's interesting to discover a particularity of another language. Thanks for all, sinceraly. - Alexandre CODOUL.

Hi, i have an hexadecimal value for the return value. I ask myself if i must continue to this way, i read somewhere else it was an old way to do it like a c++ copy/paste. I would to have something quick, with all default icons (i don't know another way for folders than to use win32.dll this is why i thought about make all with api methods) Meanwhile, to go forward i found a way to get mega folders, i post here if it can help others. var identity = System.Security.Principal.WindowsIdentity.GetCurrent(); string userName = identity.Name.ToString(); string userSID = identity.User.ToString(); List MegaFolderPaths = new List(); RegistryKey clsidKey = Registry.Users.OpenSubKey($"{userSID}\\\\Software\\\\Classes\\\\CLSID"); //Get all the sub keys it contains foreach (string subKey in clsidKey.GetSubKeyNames()) { RegistryKey clsidSubKey = Registry.Users.OpenSubKey($"{userSID}\\\\Software\\\\Classes\\\\CLSID\\\\{subKey}\\\\Instance\\\\InitPropertyBag"); if (clsidSubKey == null) continue; string defaultValue = (string)clsidSubKey.GetValue("TargetFolderPath"); if (!string.IsNullOrEmpty(defaultValue)) MegaFolderPaths.Add(defaultValue); } ------------------- Edit: for the chinese character i didn't see i forgot to add this [DllImport("shell32.dll", CharSet = CharSet.Auto)] above public static extern Int32 SHGetFileInfo(IntPtr pIDL, uint dwFileAttributes, out SHFILEINFO psfi, uint cbFileInfo, uint uFlags);