How to read data from DataBase to TextBox

// Mention System.IO for access FileStream class
FileStream fs = new FileStream("FilePath", FileMode.Open);

//Mention System.Data for access Dataset and Datatable class 
        DataSet ds = new DataSet();
        ds.ReadXml(fs);  // read XML schema 
// Use a DataTable to display the members.
DataTable dt = ds.Tables["member"];

textbox.Text = dt.Rows[row][col].ToString() // binding textbox to specified rows

DataSet ds=new DataSet();
DataSet ds = new DataSet();
//read the xml file to dataset
ds.ReadXml(Server.MapPath("XML.xml"));
//get the value to text box
TextBox1.Text=ds.Tables[0].Rows[0][0].ToString();