C#

Data Source=.\SQLEXPRESS;AttachDbFilename=C:\dbs\MyDatabase.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"

System.Data.SqlClient.SqlException in Void OnError(System.Data.SqlClient.SqlException, Boolean): Cannot open user default database. Login failed.
Login failed for user 'NT AUTHORITY\SYSTEM'.

TreeNode hostpitalNode;
hostpitalNode = treeView1.Nodes.Add("Apolo");
hostpitalNode.Nodes.Add("Dr. Krish");

int startNumber = 1;
string firstLine = "POSX (10,23,11,19)\n";
string secondLine = "POSY (19,14,12,19)\n"
string thirdStart = "L43,xf-rt";
string thirdEnd = ",18\n\n";
theNumberOftimesIWantToRepeatIt  34;
for (int i = 0;i < theNumberOftimesIWantToRepeatIt; i++)
{
    PRINT(firstLine);
    PRINT(secondLine);
    PRINT(thirdStart + (startnumber + i).ToString(D4) + thirdEnd);
}

class MyTextBox {
    TextBox textBox1 = new TextBox();
    EventHandler TextChanged;

    public MyTextBox() {
        textBox1.TextChanged += EventHandler(textBox1_TextChanged);
    }

    //Expose property
    public string Text {
        get { return textBox1.Text; }
        set { textBox1.Text = value; }
    }

    //Expose event
    private void textBox1_TextChanged(object sender, EventArgs e) {
        if (TextChanged != null)
            TextChanged();
    }

    //Expose method
    public void Clear() {
        textBox1.Clear();
    }
}