Introduction 
 
We can simply set this option in two or four steps. The main purpose of  setting this option is we can easily find out the code line number in both aspx  page and aspx.cs page. Other important one is when we facing an error in  programming it's providing the line number and error message details. So we can  quickly find out the code line number.
 
 Step 1: Before setting the line code number in Visual Studio the both  pages are look like this.
 
 ![ASPX PAGE]()
                                                                           Figure 1
![CS PAGE]()
                                                                      Figure 2
 
 Step 2: Select Tools section in visual studio editor. Select -> Tools ->  Options.
 
 ![Options]()
                                                                Figure 3
 
 Step 3: Open the Text Editor , Text Editor -> All Languages -> General ->  Click the check box Line Numbers -> Click Ok.
 
 ![Click the check box Line Numbers]()
                                                            Figure 4
 
 Step 4: After the step 3 just check out the both pages like aspx and  aspx.cs.
 
 ![Show line number]()
                                                                                  Figure 5
 
 ![Line Number]()
                                                          Figure 6
 
 
 Reference
 Summary
 
 We learned how to set the line number in Visual Studio Editor. I hope this  article is useful for all .NET beginners.