how to get error by email in mvc4

Question

i have developed a web application by using C# rezor  MVC4. it is working fine. some time client says some pages shows error while when i checked the page it shows properly. what and when exactly error come client is not able to tell me. i want to know how do get that error when it was generated. is there any way by which that error should be email to me when it genrates

 

 

 

Thanks!

 

Surendra