File Permissions in C#

For File Permission in C#, use the FileIOPermission Class. It controls the ability to access files and folders.

The following are the properties of File Permissions class −

The following are the methods of File Permission class −

Let us see an example to work wuth FileIOPermission Class in C#. Here, the Demand() method forces a SecurityException at run time if all callers higher in the call stack have not been granted the permission specified by the current instance −

Example

using System;
using System.IO;
using System.Security.Permissions;
using System.Security;

public class Demo {
   public static void Main() {

      FileIOPermission file= new FileIOPermission(PermissionState.None);
      file.AllLocalFiles = FileIOPermissionAccess.Read;
      try {
         Console.WriteLine("Demands the permission to determine whether the application has
         permission to read the files");
         file.Demand();
      }
      catch (SecurityException s) {
         Console.WriteLine(s.Message);
      }
   }
}