c# - in event definition after init, why am I getting Error 18 Use of unassigned local variable 'beforeEvntDrawArg' -

i have event object...

public class beforeevntdrawargs {     /// <summary>     /// event html.      /// </summary>           internal string innerhtml     {                 {             return this.html;         }         set         {             this.html = value;         }     }      /// <summary>     /// event tags, using data tagfields.     /// </summary>     public gamex.tagcollection tag     {         get;         private set;     }      /// <summary>     /// event text.     /// </summary>     public string text     {         get;         private set;     }      /// <summary>     /// event clue.     /// </summary>     public string hoverover     {         get;         set;     }      internal beforeevntdrawargs(event e, string[] fields)     {          this.id = e.id;         this.text = e.text;          if (e.tags != null)         {             this.tag = new gamex.tagcollection(fields, new list<string>(e.tags));         }       } } 

while trying bubble event , copy details, error 18 use of unassigned local variable 'beforeentdrawarg'

if assign null beforeevntdrawargs beforeevntdrawarg = null; compiles fine, because app bombs out saying null ref. not sure doing wrong, can me correct code?

however in event body when copying , initializing, doing wrong, why getting uninitialized @ compile time, , if use null, why break @ runtime? please let me know how resolve this..

  private beforeevntdrawargs dobeforeevntdraw(event e)      {          // issue begins here, , pre-initializing null compiles,           // breaks on runtime null ref          beforeevntdrawargs beforeevntdrawarg = new beforeevntdrawargs(e, this.tagfields)          {             hoverover = encoder.htmlencode(beforeevntdrawarg.text),             innerhtml = encoder.htmlencode(beforeevntdrawarg.text)          };          this.onbeforeevntdraw(beforeevntdrawarg);          return beforeevntdrawarg;      } 

error 18 use of unassigned local variable 'beforeevntdrawarg'

you attempting use beforeevntdrawarg within it's own object initializer. isn't supported. https://msdn.microsoft.com/en-us/library/bb397680.aspx

try this. it's same without object initialization syntax.

beforeevntdrawargs beforeevntdrawarg = new beforeevntdrawargs(e, this.tagfields) beforeevntdrawarg.hoverover = encoder.htmlencode(beforeevntdrawarg.text); beforeevntdrawarg.innerhtml = encoder.htmlencode(beforeevntdrawarg.text);