c# - Nullreferenceexception after initializing an array -

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• what nullreferenceexception, , how fix it? 29 answers

i've been trying make test game in xna (visual studio 2015), nullreferenceexception every time load this, though initialize it. here short version of it...

    namespace overbox     {         public class player         {              private player[] characterlist = new player[14];               virtual public void initialize()              {                   //characterlist = new player[14];                   characterlist[0] = new hero();                    //for (int = 0; <= characterlist.length; i++)                   //    characterlist[i].initialize();                   characterlist[0].initialize();              }     }     virtual public void draw(spritebatch spritebatch, texture2d texture)     {         //for (int = 0; <= characterlist.length; i++)         //{         //    if (characterlist[i].active)         //        characterlist[i].draw(spritebatch, texture);         //}         characterlist[0].draw(spritebatch, texture); //here error occurs     }       } } 

if wants whole class reason edit this, related code find.

edit: stack trace

overbox.exe!overbox.player.draw(microsoft.xna.framework.graphics.spritebatch spritebatch, microsoft.xna.framework.graphics.texture2d texture) line 53 c# overbox.exe!overbox.mediahandler.draw(microsoft.xna.framework.graphics.spritebatch spritebatch) line 54 c#

overbox.exe!overbox.program.main(string[] args) line 15 c#

it's supposed there.

hero class:

    namespace overbox.characters     {          class jacketed : player          {          override public void initialize()          {                 //unrelated setting of variables          }          public override void draw(spritebatch spritebatch, texture2d texture)          {                 spritebatch.draw(texture, playerposition, color.white);          }     } } 

very short version of game loop class:

  public class game1 : microsoft.xna.framework.game   {         public static player player;         //i load content playertexture requires before asks         private texture2d playertexture;           protected override void initialize()         {                player = new player();                player.initialize();         }         protected override void draw(gametime gametime)         {                spritebatch.begin();                 player.draw(spritebatch, playertexture);                 spritebatch.end();         }   } 

private player[] characterlist = new player[14]; 

makes array of player, not construct objects. end array full of null values.

you missing this:

public player() {     foreach (var character in characterlist)     {         character = new player();     } }