Explain code access security - .Net Code Security

Explain code access security.

- Code access security is a mechanism that helps limit the access to the code by protecting the resources.

- It defines permissions which tell about the rights to access various.

- It also imposes restrictions on code at run time.

- It enforces the varying levels of trust on code, which minimizes the amount of code that must be fully trusted in order to run.

- It can reduce the likelihood that your code can be misused by malicious or error-filled code.

- Code access security reduces your liability because you can specify the set of operations .

- It can also help to minimize the damage that can result from security vulnerabilities in your code.

using System;
namespace ConsoleReadRegistry
   class SecurityClass
       static void Main(string[] args)
          Microsoft.Win32.RegistryKey regKey;
             regKey =Microsoft.Win32.Registry.LocalMachine.OpenSubKey
             string[] skNames = regKey.GetSubKeyNames();
             for (int i=0;i < skNames.Length;++i)
                Console.WriteLine("Registry Key: {0}", skNames[i]);
          catch(System.Security.SecurityException e)
             Console.WriteLine("Security Exception Encountered: {0}",
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