c# - I'm getting an error when I turn on string Unicode encoding -

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so, i'm making program reads spanish dictionary. grabs random word. need turn on unicode string because there characters "é" , that, requires encoding string differently. when turn on unicode string[] gives me error message:

    system.windows.markup.xamlparseexception unhandled   message='the invocation of constructor on type 'wordaday.mainwindow' matches specified binding constraints threw exception.' line number '4' , line position '9'.   source=presentationframework   linenumber=4   lineposition=9   stacktrace:        @ system.windows.markup.xamlreader.rewrapexception(exception e, ixamllineinfo lineinfo, uri baseuri)        @ system.windows.markup.wpfxamlloader.load(xamlreader xamlreader, ixamlobjectwriterfactory writerfactory, boolean skipjournaledproperties, object rootobject, xamlobjectwritersettings settings, uri baseuri)        @ system.windows.markup.wpfxamlloader.loadbaml(xamlreader xamlreader, boolean skipjournaledproperties, object rootobject, xamlaccesslevel accesslevel, uri baseuri)        @ system.windows.markup.xamlreader.loadbaml(stream stream, parsercontext parsercontext, object parent, boolean closestream)        @ system.windows.application.loadbamlstreamwithsyncinfo(stream stream, parsercontext pc)        @ system.windows.application.loadcomponent(uri resourcelocator, boolean bskipjournaledproperties)        @ system.windows.application.dostartup()        @ system.windows.application.<.ctor>b__1(object unused)        @ system.windows.threading.exceptionwrapper.internalrealcall(delegate callback, object args, int32 numargs)        @ ms.internal.threading.exceptionfilterhelper.trycatchwhen(object source, delegate method, object args, int32 numargs, delegate catchhandler)        @ system.windows.threading.dispatcheroperation.invokeimpl()        @ system.windows.threading.dispatcheroperation.invokeinsecuritycontext(object state)        @ system.threading.executioncontext.runtrycode(object userdata)        @ system.runtime.compilerservices.runtimehelpers.executecodewithguaranteedcleanup(trycode code, cleanupcode backoutcode, object userdata)        @ system.threading.executioncontext.runinternal(executioncontext executioncontext, contextcallback callback, object state)        @ system.threading.executioncontext.run(executioncontext executioncontext, contextcallback callback, object state, boolean ignoresyncctx)        @ system.threading.executioncontext.run(executioncontext executioncontext, contextcallback callback, object state)        @ system.windows.threading.dispatcheroperation.invoke()        @ system.windows.threading.dispatcher.processqueue()        @ system.windows.threading.dispatcher.wndprochook(intptr hwnd, int32 msg, intptr wparam, intptr lparam, boolean& handled)        @ ms.win32.hwndwrapper.wndproc(intptr hwnd, int32 msg, intptr wparam, intptr lparam, boolean& handled)        @ ms.win32.hwndsubclass.dispatchercallbackoperation(object o)        @ system.windows.threading.exceptionwrapper.internalrealcall(delegate callback, object args, int32 numargs)        @ ms.internal.threading.exceptionfilterhelper.trycatchwhen(object source, delegate method, object args, int32 numargs, delegate catchhandler)        @ system.windows.threading.dispatcher.invokeimpl(dispatcherpriority priority, timespan timeout, delegate method, object args, int32 numargs)        @ ms.win32.hwndsubclass.subclasswndproc(intptr hwnd, int32 msg, intptr wparam, intptr lparam)        @ ms.win32.unsafenativemethods.dispatchmessage(msg& msg)        @ system.windows.threading.dispatcher.pushframeimpl(dispatcherframe frame)        @ system.windows.threading.dispatcher.pushframe(dispatcherframe frame)        @ system.windows.threading.dispatcher.run()        @ system.windows.application.rundispatcher(object ignore)        @ system.windows.application.runinternal(window window)        @ system.windows.application.run(window window)        @ system.windows.application.run()        @ wordaday.app.main() in c:\documents , settings\admin\my documents\wordaday\wordaday\obj\x86\debug\app.g.cs:line 0        @ system.appdomain._nexecuteassembly(runtimeassembly assembly, string[] args)        @ system.appdomain.executeassembly(string assemblyfile, evidence assemblysecurity, string[] args)        @ microsoft.visualstudio.hostingprocess.hostproc.runusersassembly()        @ system.threading.threadhelper.threadstart_context(object state)        @ system.threading.executioncontext.run(executioncontext executioncontext, contextcallback callback, object state, boolean ignoresyncctx)        @ system.threading.executioncontext.run(executioncontext executioncontext, contextcallback callback, object state)        @ system.threading.threadhelper.threadstart()   innerexception: system.indexoutofrangeexception        message=index outside bounds of array.        source=wordaday        stacktrace:             @ wordaday.mainwindow.newword() in c:\documents , settings\admin\my documents\wordaday\wordaday\mainwindow.xaml.cs:line 132             @ wordaday.mainwindow..ctor() in c:\documents , settings\admin\my documents\wordaday\wordaday\mainwindow.xaml.cs:line 33        innerexception:

which, way, wacky me , can't understand it. asking, mean when coming code?:

        #region setup         random word = new random();         string[] lines = file.readalllines(dictionarypath, encoding.unicode);         int randomword = word.next(1, lines.count());          string[] excludedlines;         if (!file.exists(path))         {             file.create(path);         }         excludedlines = file.readalllines(path);         string chosenword = lines[randomword];         #endregion          #region logic         if (excludedlines.count() == 58110)         {             file.writealltext(path, "");         }         if (excludedlines.contains(chosenword))         {             while (excludedlines.contains(chosenword))             {                 randomword = word.next(58110);                 chosenword = lines[randomword];             }              file.appendalltext(path, chosenword + environment.newline);             excludedlines = file.readalllines(path);             label1.content = chosenword;          }         else         {             file.appendalltext(path, chosenword + environment.newline);             excludedlines = file.readalllines(path);             label1.content = chosenword;         }         #endregion

the following 2 lines throw index out of range exception:

        randomword = word.next(58110);         chosenword = lines[randomword];

surely following make more sense:

        randomword = word.next(lines.length);         chosenword = lines[randomword];

also, following line:

        int randomword = word.next(1, lines.count());

should be

        int randomword = word.next(lines.length);

in version, word @ lines[0] never chosen randomly, looks wrong.


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