What’s wrong with this code? Find the error(s) in the following code, which is supposed to read a line from some- file.txt, convert the line to uppercase and then append it to somefile.txt.



 string strPath = "somefile.txt";

 string strContents;



 StreamWriter objStreamWriter;

 objStreamWriter = new StreamWriter( strPath, true );



 StreamReader objStreamReader;

 objStreamReader = new StreamReader( strPath );



 strContents = objStreamReader.ReadLine();



 strContents = strContents.ToUpper();



 objStreamWriter.Write( strContents );



 objStreamReader.Close();

 objStreamWriter.Close();

Once the StreamWriter opens the file specified by strPath, the file is marked

open. While open, no other object can open the file. Thus a run-time error occurs when StreamReader tries to open the same file. The complete incorrect code reads:




 // MakeUppercase.cs (Incorrect)





 using System;


 using System.Drawing;


 using System.Collections;


 using System.ComponentModel;


 using System.Windows.Forms;


 using System.Data;


 using System.IO;





 namespace MakeUppercase


 {


 /// 


 /// Summary description for FrmMakeUppercase.


 /// 



 public class FrmMakeUppercase : System.Windows.Forms.Form


 {


 private System.Windows.Forms.Label lblResult;


 private System.Windows.Forms.TextBox txtDisplay;


 /// 


 /// Required designer variable.


 /// 



 private System.ComponentModel.Container components = null;





 public FrmMakeUppercase()


 {


 //


 // Required for Windows Form Designer support


 //


 InitializeComponent();





 //


 // TODO: Add any constructor code after InitializeComponent


 // call


 //


 }





 /// 


 /// Clean up any resources being used.


 /// 



 protected override void Dispose( bool disposing )


 {


 if( disposing )


 {


 if (components != null)


 {


 components.Dispose();


 }


 }


 base.Dispose( disposing );


 }





 // Windows Form Designer generated code





 /// 


 /// The main entry point for the application.


 /// 



 [STAThread]


 static void Main()


 {


 Application.Run( new FrmMakeUppercase() );


 }





 // converts a line from somefile.txt to uppercase and


 // appends it to the end of the file


 private void FrmMakeUppercase_Load(


 object sender, System.EventArgs e )


 {


 string strPath = "somefile.txt";


 string strContents;





StreamWriter objStreamWriter;


objStreamWriter = new StreamWriter( strPath, true );


StreamReader objStreamReader;


objStreamReader = new StreamReader( strPath );





 strContents = objStreamReader.ReadLine();





 strContents = strContents.ToUpper();





 objStreamWriter.Write( strContents );





 objStreamReader.Close();


 objStreamWriter.Close();





 // display the results


 objStreamReader = new StreamReader( strPath );





 strContents = objStreamReader.ReadLine();


 txtDisplay.Text += strContents + "\t”;





 strContents = strContents.ToUpper();


 txtDisplay.Text += strContents;





 objStreamReader.Close();





 } // end method FrmMakeUppercase_Load





 } // end class FrmMakeUppercase


 }