Click here to Skip to main content
15,895,256 members
Articles / Programming Languages / C#

DynamicObjects – Duck-Typing in .NET

Rate me:
Please Sign up or sign in to vote.
5.00/5 (9 votes)
4 Nov 2010CPOL16 min read 54.9K   511   30  
Using structural-typing and duck-typing in .NET via interfaces

namespace Pfz.DataTypes
{
	/// <summary>
	/// Interface used as a read-only value container.
	/// </summary>
	public interface IReadOnlyValueContainer
	{
		/// <summary>
		/// Gets the Value of this container.
		/// </summary>
		object Value { get; }
	}
	/// <summary>
	/// Interface used as a write-only value container.
	/// </summary>
	public interface IWriteOnlyValueContainer
	{
		/// <summary>
		/// Sets the Value of this container.
		/// </summary>
		void SetValue(object value);
	}

	/// <summary>
	/// Interface used by any component that holds a value.
	/// Used by Box class and by RecordBound controls.
	/// </summary>
	public interface IValueContainer:
		IReadOnlyValueContainer,
		IWriteOnlyValueContainer
	{
	}

	/// <summary>
	/// Typed version of the read-only container.
	/// </summary>
	public interface IReadOnlyValueContainer<out T>:
		IReadOnlyValueContainer
	{
		/// <summary>
		/// Gets the Value.
		/// </summary>
		new T Value { get; }
	}

	/// <summary>
	/// Typed version of the write-only container.
	/// </summary>
	public interface IWriteOnlyValueContainer<in T>:
		IWriteOnlyValueContainer
	{
		/// <summary>
		/// Set the value of this container.
		/// </summary>
		void SetValue(T value);
	}

	/// <summary>
	/// Typed version of the value container.
	/// </summary>
	public interface IValueContainer<T>:
		IReadOnlyValueContainer<T>,
		IWriteOnlyValueContainer<T>
	{
	}
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer (Senior) Microsoft
United States United States
I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.

At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.

Want more info or simply want to contact me?
Take a look at: http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com

Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).

Comments and Discussions