c# - Why is BackgroundWorker exception not handled? -


this code throws exception. in class called githelper called class gitprogressdialog it's bw_dowork method.

public class githelper {  ....             if (!run(commands[i]))             {                 var e = new invalidoperationexception(error);                 e.data["stepindex"] = i;                 throw e;             }      ...

this code handling exceptions:

public partial class gitprogressdialog : form {  ...     private void bw_runworkercompleted(object sender, runworkercompletedeventargs e)     {         if (e.cancelled == true)         {          }         else if (e.error != null)         {             success = false;             errorstepindex = (int)e.error.data["stepindex"];             seterror(e.error.message);         }         else         {             success = true;             this.close();         }     }

error happening in line:

errorstepindex = (int)e.error.data["stepindex"];

system.nullreferenceexception object reference not set instance of object.

i guess data not set well? why? works me withing visual studio , without debugger. client activates main exception handling routine logs , closes app.


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