C#

//Form main:
public void createForm(){
Child child = new Child(this);
child.show();
this.Enabled = true;
}
public void show(){
this.Enabled = false;
}
//Form child
public Child(Main m){
this.main = m;
}
public void Dispose(){
main.show();
}

//Form main
public void createForm(){
Child child = new Child();
child.show();
this.Enabled = true;
}
public void child_Disposed(object sender, EventArgs e){
this.Enabled = false;
}

string lat = p[u].X.ToString().Replace(',', '.');
MessageBox.Show(lat);

MessageBox.Show(Convert.ToDouble(lat).ToString());

webBrowser.Navigate("http://www.google.com");
using (StreamWriter sw = File.CreateText(path))
{
sw.Write(webBrowser.DocumentText);
}

class MyFile : FileSystemInfo
 {
     private FileInfo _strFile;
     public MyFile(FileInfo strFile)
     {
         _strFile = strFile;
     }

     public override void Delete()
     {
         _strFile.Delete();
     }

     public override bool Exists
     {
         get
         {
             if (_strFile.Exists)
             {
                 return true;
             }
             else
             {
                 return false;
             }

         }
     }

     public override string Name
     {
         get { return _strFile.Name;}
     }
 }

class MyFiles : IEnumerable<MyFile>
 {
     private string _directoryPath;
     private string _fileExtension = "xml";

     public MyFiles(string directoryPath)
     {
         _directoryPath = directoryPath;
     }

     public string FileExtension
     {
         get { return _fileExtension; }
         set { _fileExtension = value; }
     }

     #region IEnumerable<MyFile> Members

     public IEnumerator<MyFile> GetEnumerator()
     {
         DirectoryInfo di = new DirectoryInfo(_directoryPath);
         FileInfo[] rgFiles = di.GetFiles("*." + _fileExtension);
         foreach (FileInfo fi in rgFiles)
         {
             MyFile ss = new MyFile(fi);
             yield return ss;
         }
     }

     #endregion

     #region IEnumerable Members

     IEnumerator IEnumerable.GetEnumerator()
     {
         DirectoryInfo di = new DirectoryInfo(_directoryPath);
         FileInfo[] rgFiles = di.GetFiles("*." + _fileExtension);
         foreach (FileInfo fi in rgFiles)
         {
             MyFile ss = new MyFile(fi);
             yield return ss;
         }
     }

     #endregion

 }

static void Main()
   {
       MyFiles myFS = new MyFiles(@"D:\TestInterface");
       foreach(MyFile FS in MyFiles)
       {
           Console.WriteLine(FS.Name);
           Console.ReadLine();
       }

   }