c# - all menu item's become selectable -

i trying create simple menu, string selected changes colur instructed do, can't seem space out each item in string list on y axis, positioned in middle @ top of screen overlapping each other. know simple fix novice @ xna. appreciated. in advance.

menumanagement class

using microsoft.xna.framework; using microsoft.xna.framework.content; using microsoft.xna.framework.graphics; using microsoft.xna.framework.input; using system; using system.collections.generic; using system.linq; using system.text;  namespace game2 {     class menumanagement      {         keyboardstate keyboard;         keyboardstate prevkey;          mousestate mouse;          vector2 position;          list<string> buttonlist = new list<string>();         spritefont spritefont;         int selected = 0;           public menumanagement ()         {              buttonlist.add("play");             buttonlist.add("options");             buttonlist.add("instructions");             buttonlist.add("exit");          }        private void measuremenu()     {         height = 0;         width = 0;           foreach (string item in buttonlist)          {              vector2 size = spritefont.measurestring(item);              height += spritefont.linespacing + 5;          }     }          public void loadcontent (contentmanager content )         {             spritefont = content.load<spritefont>("spritefont");                    }          public void update (gametime thegametime)         {              keyboard = keyboard.getstate();              if (checkkeyboard(keys.up))             {                 if (selected > 0)                 {                     selected--;                 }             }              if (checkkeyboard(keys.down))             {                 if (selected < buttonlist.count - 1)                 {                     selected++;                 }             }              prevkey = keyboard;          }          public bool checkkeyboard (keys key)         {             return (keyboard.iskeydown(key) && prevkey.iskeydown(key));          }          public void draw (spritebatch thespritebatch)         {             thespritebatch.begin();             color color;               (int = 0; < buttonlist.count; i++)             {                 vector2 location = position;                 if (i == selected)                 {                     color = color.yellow;                 }                 else                 {                     color = color.blue;                 }           location.y += spritefont.linespacing + 5;     }            thespritebatch.drawstring(spritefont, buttonlist[0], new vector2 (300, 100), color);     thespritebatch.drawstring(spritefont, buttonlist[1], new vector2(300, 150), color);     thespritebatch.drawstring(spritefont, buttonlist[2], new vector2(300, 200), color);     thespritebatch.drawstring(spritefont, buttonlist[3], new vector2(300, 250), color);     thespritebatch.end();          }      }   } 

game1

using microsoft.xna.framework; using microsoft.xna.framework.graphics; using microsoft.xna.framework.input;  namespace game2 {     /// <summary>     /// main type game.     /// </summary>     public class game1 : game     {         graphicsdevicemanager graphics;         spritebatch thespritebatch;         public static rectangle screen;         public static string gamestate = "menu";         menumanagement menumanagement;           public game1()         {             graphics = new graphicsdevicemanager(this);             content.rootdirectory = "content";         }           protected override void initialize()         {             // todo: add initialization logic here             menumanagement = new menumanagement();             screen = new rectangle(0, 0, graphics.preferredbackbufferwidth, graphics.preferredbackbufferheight);             base.initialize();         }           protected override void loadcontent()         {              thespritebatch = new spritebatch(graphicsdevice);             menumanagement.loadcontent(content);              // todo: use this.content load game content here         }              protected override void unloadcontent()             {                 // todo: unload non contentmanager content here             }   // <param name="gametime">provides snapshot of timing values.</param>         protected override void update(gametime gametime)         {             if (gamepad.getstate(playerindex.one).buttons.back == buttonstate.pressed || keyboard.getstate().iskeydown(keys.escape))                 exit();     switch (gamestate)         {             case "menu":                 menumanagement.update(gametime);                 break;         }         base.update(gametime);     }      /// <param name="gametime">provides snapshot of timing values.</param>     protected override void draw(gametime gametime)     {          switch (gamestate)         {             case "menu":                 menumanagement.draw(thespritebatch);                 break;         }         base.draw(gametime);      } } } 

you can calculate length of strings , place next item want. should spritefont.measurestring().

https://msdn.microsoft.com/en-us/library/bb464128(v=xnagamestudio.30).aspx

to clear, reason overlapping because putting them in same position:

vector2 location = position;  

and then:

new vector2 (300, location.y) 

is drawing entire batch. need change position of each of menu items. simplest fix increment y value of location each item. move next menu item toward bottom. increment x move right.