Code Access Security

In VS2010 to do CAS we sholud create the following App.Config file

then we try to block the read or write permissions in a particular file or folder

using System.Security.Permissions; // Add reference

using System.IO;

[assembly: FileIOPermission(SecurityAction.RequestRefuse,Read = @"C:\")]

namespace CASs

{

public partial class Form2 : Form

{

public Form2()

{

InitializeComponent();

}

private void btnread_Click(object sender, EventArgs e)

{

try

{

StreamReader sr = new StreamReader(@"C:\sunil2.txt");

textBox1.Text = sr.ReadToEnd();

sr.Close();

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

}

}

}

we cannot read the file since we set the security rules

Posted in: CAS