c# - XNA Textbox loop -

so im trying make textbox ( not textbox, changing spritefont text ) on xna 4.0 win game heres code far :

usernamevar.draw(spritebatch, newinputtext); 

that draw newinputtext string each frame

newinputtext = username.update(mouse); 

that set string heres problem

class textbox {     public texture2d texture;     public rectangle rectangle;     public bool isclicked;      public textbox(texture2d newtexture, rectangle newrectangle)     {         texture = newtexture;         rectangle = newrectangle;     }     public void draw(spritebatch spritebatch)     {         spritebatch.draw(texture, rectangle, color.white);     }     public string update(mousestate mouse)     {         rectangle mouserectangle = new rectangle(mouse.x, mouse.y, 1, 1);         var textboxtext = new newtext();          if (mouserectangle.intersects(rectangle))         {             isclicked = true;             if (isclicked)             {                 textboxtext.newtext = "a";                 connection.sendpacketbool("ae", textboxtext.newtext);                 return textboxtext.newtext;               }         }          return null;     } } class newtext {     public string newtext     {                  {              return this.newtext;          }         set          {              this.newtext = value;          }     } } 

this textbox.cs file giving me errors first should avoid returning outside if statement ?

public string update(mousestate mouse)     {         rectangle mouserectangle = new rectangle(mouse.x, mouse.y, 1, 1);         var textboxtext = new newtext();          if (mouserectangle.intersects(rectangle))         {             isclicked = true;             if (isclicked)             {                 textboxtext.newtext = "a";                 connection.sendpacketbool("ae", "a");                 return "yo";               }         }          return null;     } 

since return null breaks me textbox ( cant add null text spritefont ) if remove return null adding return "something" error on set propertie

an unhandled exception of type 'system.stackoverflowexception' 

sorry this, im new c# , stuff, thanks

i'm not sure of exact structure of project, , i'm not sure reason newtext class, property contains called itself, over, , over, , on again.

class newtext {     public string newtext     {                  {              return this.newtext; //get newtext again, gets again, , again, etc         }         set          {              this.newtext = value; //set newtext, calls set again, , again...         }     } } 

when or set newtext, or set on , on again, resulting in recursive loop. never end , lead stackoverflowexception.

the proper way use property have public accessor (newtext) perform logic (in case, , set) , return or set value, in case, storage variable newtext

here example:

private string newtext; //storage field  public string newtext //accessor {     { return newtext; }     set { newtext = value; } } 

c# 3.0 has automatic properties, not necessary (:p).

as added note, not have use string class, string , string same thing, using string preferred method.