VB.NET RUN TIME ERROR System.InvalidOperationException

Question

Event Type:    Error
Event Source:    .NET Runtime
Event Category:    None
Event ID:    1026
Date:        14/03/2012
Time:        3:54:35 PM
User:        N/A
Computer:    SUNIL
Description:
Application: TATAEXCELNEW.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.InvalidOperationException
Stack:
   at

Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
   at

Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(System.String[])
   at TATAEXCELNEW.My.MyApplication.Main(System.String[]