I have created a C#-> Asp.Net Empty Web Application (Framework 4.0). I want to add few line of code in Global.asax on Application_Error section. But unfortuantely global.asa
You can add a new file to the project of type Global Application Class
File -> New -> File -> Global Application Class
Alternately, you can create a new temporary project, which should generate a Global.asax file. Then just copy/paste that into your project.