c# - Xaml Parse Exception WPF -

i have encountered problem whack mole game:

xamlparseexception unhandled

'the invocation of constructor on type 'whackamolereal.mainwindow' matches specified binding constraints threw exception.' line number '3' , line position '9'.

this main code:

using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks; using system.windows; using system.windows.input; using system.windows.media; using system.windows.media.imaging; using system.windows.controls; using system.windows.data; using system.windows.documents; using system.windows.navigation; using system.windows.shapes; using system.windows.threading; using system.io; using teiutils;  namespace whackamolereal {     /// <summary>     /// interaction logic mainwindow.xaml     /// </summary>     public partial class mainwindow : window     {          //global variables\\         string[] cmdargs = environment.getcommandlineargs();         string moleini;         string root = "";         int imagesize;          public mainwindow()         {             //setting .ini prefences\\             root = tutils.getinistring(moleini, "root", "path", "");             moleini = cmdargs[1];             initializecomponent();              // dispacher full game time \\             system.windows.threading.dispatchertimer endgame = new system.windows.threading.dispatchertimer();             endgame.tick += new eventhandler(endgame_tick);             endgame.interval = timespan.fromseconds(5);             endgame.start();         }          private void endgame_tick(object sender, eventargs e)         {             this.close();         }          private void populategrid()         {             double numofimages = tutils.getiniint(moleini, "numpictures", "pictures", 8);             int imagesize = tutils.getiniint(moleini, "imagesize", "imagesize", 50);             int imagebordersize = tutils.getiniint(moleini, "imageborder", "imageborder", 2);             double numberofcolumns = tutils.getiniint(moleini, "numrowscolumns", "columnnum", 4);              // more columns rows \\             if (numberofcolumns > numofimages)             {                 messagebox.show("there wrong .ini file.");                 mainwin.close();             }              // math - necessary variables \\             int columnsize = (imagesize + (4 * imagebordersize));             int rowsize = (imagesize + (4 * imagebordersize));             int numberofrows = (int)math.ceiling(numofimages / numberofcolumns);             int mainwindowwidth = (tutils.toint(numberofcolumns.tostring(), 4) * columnsize) + 15;             int mainwindowheight = (numberofrows * rowsize) + 35;               // set window size \\             mainwin.width = mainwindowwidth;             mainwin.height = mainwindowheight;              // create grid \\             grid grid_main = new grid();             mainwin.content = grid_main;             grid_main.height = mainwindowheight;             grid_main.width = mainwindowwidth;              // grid properties \\             (int = 0; < numberofcolumns; i++)             {                 columndefinition newcolumn = new columndefinition();                 newcolumn.width = new gridlength(columnsize, gridunittype.pixel);                 grid_main.columndefinitions.add(newcolumn);             }              (int = 0; < numberofrows; i++)             {                 rowdefinition row = new rowdefinition();                 row.height = new gridlength(rowsize, gridunittype.pixel);                 grid_main.rowdefinitions.add(row);             }              // fill grid \\             int rowcount = 0;             int columncount = 0;             (int = 0; < numofimages; i++)             {                 //  grid_main.children.add(grid_main);                  if (rowcount < numberofrows)                 {                     if (columncount < numberofcolumns)                     {                         console.writeline("columncount: " + columncount.tostring());                         grid.setrow(createimage(), columncount);                         grid.setcolumn(createimage(), columncount);                         columncount++;                     }                      else                     {                         rowcount++;                         columncount = 0;                         grid.setrow(createimage(), columncount);                         grid.setcolumn(createimage(), columncount);                         columncount++;                         console.writeline("rowcount: " + rowcount.tostring());                     }                 }                  else                 {                     break;                 }              }         }          private image createimage()         {             // gets/sets necessary variables \\             double imageheight = imagesize * 0.7;              // initialize image \\             system.windows.controls.image newimage = new image();              // image properties \\             newimage.width = imagesize;             newimage.height = imageheight;              // define name , content \\             newimage.name = "image";             string imagefunction = tutils.getinistring(moleini, "image", "picturefile", root + "mole2.png");             if (file.exists(imagefunction))             {                 newimage.source = new bitmapimage(new uri(imagefunction));             }             else             {                 messagebox.show("cannot find " + imagefunction + ".", "please fix ini file");             }              return newimage;         }          }  } 

and xaml:

<window x:name="mainwin" x:class="whackamolereal.mainwindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         title="mainwindow" height="350" width="525">     <grid>         <image margin="353,156,-131,-58" source="mole2.png" stretch="fill"/>         <textblock horizontalalignment="left" margin="20,10,0,0" textwrapping="wrap" text="can catch mole?" verticalalignment="top" height="79" width="497" fontfamily="simhei" fontsize="40"/>      </grid> </window> 

environment.getcommandlineargs() should return @ least array of 2 objects, since referring in constructor

moleini = cmdargs[1]; 

i tried out code. environment.getcommandlineargs() returning 1 object.