c# - SQLite in Xamarin throws exception in connection -

i have problem. using xamarin ios , android applications. throws exception when try build connection folder path. code: public class queries { private string folder = dependencyservice.get().getappdatafolder();

    public bool createdatabase()     {         try         {             using (var connection = new sqliteconnection(path.combine(folder, "test.db")))             {                 connection.createtable<posten>();                 return true;             }         }         catch (sqliteexception ex)         {             system.diagnostics.debug.writeline("sqliteex", ex.message);             return false;         }     } } 

it throws exception in using. use dependencyservice path want put database in.

private string folder = dependencyservice.get<ifilesystemservice>().getappdatafolder(); 

on android side (i'm testing android) have implemented this:

public class filesystemserviceandroid : ifilesystemservice {     public string getappdatafolder()     {         return system.environment.getfolderpath(system.environment.specialfolder.personal);     } } 

this exception says:

unhandled exception:

system.typeinitializationexception: type initializer >'sqlite.sqliteconnection' threw exception. occurred

i moved code try access createdatabase method toolbar initialized , got message box in application:

in project sqlite.pcl in xamarin.android, using following database folder , file location:

string dbfolder = android.os.environment.externalstoragedirectory.absolutepath + "/project_name/"; string dbfilename = "project_name.db"; string dbpath = dbfolder + dbfilename; //to check if database file exists: system.io.file.exists(dbpath); //to delete database file: system.io.file.delete(dbpath); sqliteconnection dbconn = new sqliteconnection(dbpath);