Where is using the PDB file

[aa]

Where is using PDB file. Whne I am deleting it, the application still
working

 

[Steve C. Orr [MVP, MCSD]]

The PDB is only used for debugging purposes.
When an error occurs, it provides extended information about the error such
as the line number and some source code.
Without the PDB the app will still run, but your debugging abilities will be
diminished.