/// <summary>
/// Creates a copy of the current instance that is read-only.
/// <seealso cref="IsReadOnly"/>
/// </summary>
/// <returns>A read-only instance.</returns>
public NameValueCollectionEx ToReadOnly()
{
var result = new NameValueCollectionEx();
result.Add(this);
result.IsReadOnly = true;
return(result);
}
/// <summary>
/// Creates a copy of the current instance that is read-only.
/// </summary>
/// <param name="value">Specifies the collection to convert to read-only.</param>
/// <returns>A read-only instance.</returns>
public static NameValueCollection ToReadOnly(this NameValueCollection value)
{
Contract.Requires <ArgumentNullException>(value != null, "value is null.");
var result = new NameValueCollectionEx();
result.Add(value);
return(result.ToReadOnly());
}