How to display files in a multiple directory?

Question

I'm making a mini disk cleaner and I have wrote this code: 

listView1.Items.Clear();
DirectoryInfo dirCustom = new DirectoryInfo("C:\\Windows\\");
FileInfo[] filCustom;
filCustom = dirCustom.GetFiles("*.txt");
foreach (FileInfo filFile in filCustom)
{
listView1.Items.Add(filFile.Name, "test");
}

However there are some missing parts, works fine but i need to search multiple path and extensions and it only displays the file name on the list view on detailed view. I want it to display the folder path and file size.