Access listbox from anywhare in the code

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C#5.0

I found a simple console code that gets the NTFS permissions


static void DumpSecurity(string path)

{

FileSecurity sec = File.GetAccessControl(path);

if (sec == null)
{
Console.WriteLine("File not found.");

return;
};

foreach (FileSystemAccessRule rule in sec.GetAccessRules(true, true, typeof(NTAccount)))
{

StringBuilder bldr = new StringBuilder();

if (rule.AccessControlType == AccessControlType.Deny)

bldr.Append("[DENY] ");

if (rule.IsInherited)

bldr.Append("[INHERITED] ");

bldr.AppendFormat("{0} ", rule.IdentityReference);

bldr.Append(rule.FileSystemRights);

Console.WriteLine(bldr.ToString());

};


};

What I am trying to do now is to use the code in a windowsForm application

added a listBox and a button

-The function is triggered by a button event
DumpSecurity(path);

so my problem is I cannot see the listbox within the DumpSecurity() function. In other words, trying to replace the

Console.WriteLine(bldr.ToString());
by
listBox1.Items.Add(bldr.ToString());

how can I make the listbox accessible (global) inside the function?
many thanks

What I have tried:

programmatically create a listbox inside the function, not a clean solution