C#

foreach (Form child in this.MdiChildren)
{
   if (child is ChildForm1)
   {
      ChildForm1 theChild = (ChildForm1)child;
      MessageBox.Show(theChild.SomeProperty);
      theChild.DoSomething();
   }
}

private MdiClient m_MdiClient;
public MdiClient MdiClient
{
    get
    {
        if (m_MdiClient != null)
            return m_MdiClient;
        foreach (Control control in Controls)
        {
            if (control is MdiClient)
            {
                m_MdiClient = (MdiClient)control;
                return m_MdiClient;
            }
        }
        throw new Exception("MdiClient control could not be found");
    }
}

// Set up the DataGridView.
            dataGridView1.Dock = DockStyle.Fill;

            // Automatically generate the DataGridView columns.
            dataGridView1.AutoGenerateColumns = true;

            // Set up the data source.
            bindingSource1.DataSource = GetData("Select * From Products");
            dataGridView1.DataSource = bindingSource1;

            // Automatically resize the visible rows.
            dataGridView1.AutoSizeRowsMode =
                DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders;

            // Set the DataGridView control's border.
            dataGridView1.BorderStyle = BorderStyle.Fixed3D;

            // Put the cells in edit mode when user enters them.
            dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;

public string concat(ICollection values)
{
  return (string)values.Cast<object>().Aggregate((x, y) => x.ToString() + y.ToString());
}</object>

Member 2148527 wrote:

I'm still getting the "type arguments for method ... cannot be inferred from the usage" error. Even tried throwing gratuitious use of "Object" back in (Object x, Object y).

Thanks for the attempt, though.

ahfong wrote:

The problem is that the results are good but NUnit reports an MDA memory problem probably due to the way I'm marshalling.

JoeRip wrote:

In fact, the example quite clearly shows the lock being applied in only one place,