ASP.NET C#

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Error:

String was not recognized as a valid Date Time.

                       When You get a age from birth date to current date, then use code listed below:

Code:

            int birth_year = Convert.ToDateTime("15/12/1996").Year;
            int now_year = DateTime.Now.Year; // 2016
            int age = now_year - birth_year;
            age.Text = aged.ToString(); 

 Solution: 

                      Although the above solutions are effective, you can also modify 

                      the webconfig file with the following...

<configuration>                       
   <system.web>                       
     <globalization culture="en-GB"/> 
   </system.web>                      
</configuration>                      

 Output:

 20