c# Protecting a connectionstring in a configuration file

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1. private void DataProtectionAPI()   
2. {   
3.     try   
4.     {   
5.         System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(   
6.         System.Reflection.Assembly.GetExecutingAssembly().Location);   
7.   
8.         ConnectionStringsSection section =   
9.         config.GetSection("connectionStrings") as ConnectionStringsSection;   
10.   
11.         if (!section.SectionInformation.IsProtected)   
12.         {   
13.             section.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");   
14.             config.Save();   
15.         }   
16.   
17.     }   
18.     catch   
19.     {   
20.     }   
21. }