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Tag Archives: C

How can I get objects and property values from expression trees?

This is a follow-up to the Getting Information About Objects, Types, and Members with Expression Trees post, so I would recommend that you read that one first. Among other code examples in that blog post, I demonstrated how you can get a property name…

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Covariance and Contravariance FAQ

In this post I’ll try to answer the most common questions I find on forums and in documentation feedback about C# covariance and contravariance. It’s a big topic for a single blog post, so expect to see a lot of “more information” links.
Speci…

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What is the difference between “dynamic” and “object” keywords?

Let’s take a quick look at the object keyword first. I’m not going to talk a lot about it because it’s been around since C# 1.0. This keyword is nothing more than a shortcut for System.Object, which is the root type in the C# class hierarchy. (Ho…

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Getting Information About Objects, Types, and Members with Expression Trees

Starting with C# 3.0 and Visual Studio 2008, you can use expression trees to get information about objects, types, and members. In this post I’m going to show some examples and explain what benefits you can get by using this technique. If you are not…

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Debugging Expression Trees in Visual Studio 2010

First of all, let’s take a look at the example from one of my previous posts. It creates an expression tree for calculating the factorial of a number.ParameterExpression value =
Expression.Parameter(typeof(int), “value”);
ParameterExpression res…

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Dynamic in C# 4.0: Creating Wrappers with DynamicObject

In the previous post I showed how you can use the new dynamic feature and the ExpandoObject class to add and remove properties at run time, and how this can make your code more readable and flexible than code written with LINQ to XML syntax.
But there…

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Dynamic in C# 4.0: Introducing the ExpandoObject

You have probably already heard about the new dynamic feature in C# 4.0 and how it is used to support COM interop. If you haven’t, I strongly recommend reading the following MSDN articles: Using Type dynamic and How to: Access Office Interop Objects by…

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Generating Dynamic Methods with Expression Trees in Visual Studio 2010

Expression trees first appeared in Visual Studio 2008, where they were mainly used by LINQ providers. You can use expression trees to represent code in a tree-like format, where each node is an expression. You can also convert expression trees into com…

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WPC09 – My Windows Azure Session

Here is my session from the WPC09 in New Orleans:Lap around Windows Azure, Business Edition
Big thanks to Eilert Hanoa from Mamut ASA for his help with the session, and to everyone who attended. :)
Hope everyone enjoyed WPC! :)
Technorati Tags: WPC09,…

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