C#

1. "Data Source=.\SQLEXPRESS;
User Id=sa;Password=hello;
AttachDbFilename=C:\inetpub\wwwroot\MySite\dbs\MyDb.mdf;
Connect Timeout=30"

2. "Data Source=.\SQLEXPRESS;
AttachDbFilename=C:\inetpub\wwwroot\MySite\dbs\MyDb.mdf;
Integrated Security=True;Connect Timeout=30;User Instance=True"

System.Data.SqlClient.SqlException: 
Unable to open the physical file "C:\inetpub\wwwroot\MySite\dbs\MyDb.mdf". 
Operating system error 5: "5(Access Denied)".
An attempt to attach an auto-named database for file
C:\inetpub\wwwroot\MySite\dbs\MyDb.mdf failed. 
A database with the same name exists, 
or specified file cannot be opened, 
or it is located on UNC share.

SqlConnection con = new SqlConnection(this.connection);
SqlDataAdapter da = new SqlDataAdapter(sql, con);
DataSet ds = new DataSet();                        
int nRows = da.Fill(ds, "Persons");

private double btnZero_Click(object sender, EventArgs e)
        {
            dblOffset = dblReceive * -1;
            return dblOffset;
        }

string[] dn = usr.DistinguishedName.Split(',');
Array.Reverse(dn);

TreeNode root = new TreeNode();
TreeNode prev = new TreeNode();

foreach (string s in dn)
{
    if (s.Contains("OU="))
    {
        string tmp = s.Replace("OU=", string.Empty);

        if (string.IsNullOrEmpty(root.Text))
        {
            root.Text = tmp;
        }
        else
        {
            if (string.IsNullOrEmpty(prev.Text))
            {
                prev.Text = tmp;
                root.Nodes.Add(prev);
            }
            else
            {
                TreeNode n = new TreeNode();
                n.Text = tmp;

                prev.Nodes.Add(n);
                prev = n;
            }
        }
    }
}
tvUsers.Nodes.Add(root);