C#

public class R
{
        public R(){a=10;b=56;}
	int a, b;
	public int A{
		get{return a;}
		set{a = value;}}
	public int B
	{
		get{return b;}
		set{b = value;}
	}
}

public class Col: CollectionBase 
{
	public Col(){}
	public virtual void Add(R valueT)
	{
		this.List.Add(valueT);
	}
// ...
}

public MyItem this[int i] 
{
  get {return (MyItem) base.List[i];}
  set {base.List[i] = value;}
}

<br />
UserControl control = (UserControl)Page.LoadControl("Components/UserControl.ascx");<br><br />
Type t1 = control.GetType();<br><br />
// you can discover members and methods supported by t1 thanks to reflection :<br><br />
// .MemberInfo<br><br />
// .MethodInfo<br><br />
// ...<br><br />

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"All programmers are playwrights and all computers are lousy actors."

DataSet ds = GetMyDataSet () ;<br />
<br />
DataTable dt = ds.Tables["Results"] ;<br />
DataView dv = new DataView (dt) ;<br />
dv.AllowNew = false ;<br />
<br />
dataGrid1.DataSource = dv ;

DataView dv = (DataView )dataGrid1.DataSource ;<br />
DataTable dt = dv.Table ;<br />
dt.Rows[dg.CurrentCell.RowNumber].Delete ;

BindingManagerBase cm = this.BindingContext[dg.DataSource] ;<br />
DataRowView drv = (DataRowView )cm.Current ;<br />
((DataRow )drv.Row).Delete () ;