Add property to dynamic object .NET

Question

I probably want too much, but my scenario is

public dynamic CreateConfigObject(JobConfigurationModel config) {
    dynamic configObject = new { };

    configObject.Git = new GitCheckout {
        Repository = config.Github.Url
    };

    return configObject;
}

Of course, it fails on configObject.Git since this property does not exist. I want to be able to add any number of properties at run time, with out any beforehand knowledge of number and names of properties;

Is such case possible in C# at all, or my ill JavaScript imagination starts to hurt me? :)

possible duplicate of [How do I create dynamic properties in C#?](http://stackoverflow.com/questions/947241/how-do-i-create-dynamic-properties-in-c) — nawfal, Jul 20 '14 at 06:23

score 35 · Accepted Answer · answered Jul 14 '11 at 19:39

35

dynamic allows loosely-typed access to strongly-typed objects.

You should use the ExpandoObject class, which allows loosely-typed access to an internal dictionary:

dynamic configObject = new ExpandoObject();

configObject.Git = new GitCheckout {
    Repository = config.Github.Url
};

answered Jul 14 '11 at 19:39

SLaks

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2

ExpandoObject, now my favorite object of .NET :) – Alexander Beletsky Jul 14 '11 at 19:51
12

Do not overuse `ExpandoObject`. Don't abandon compile-time type-safety unless you really need to. – SLaks Jul 14 '11 at 20:00
2

Actually found a Skeet-Link to this topic: http://stackoverflow.com/questions/1394117/attaching-properties-and-methods-at-runtime-in-c-4-0/1394134#1394134 – Tim Schmelter Jul 14 '11 at 20:05

Add property to dynamic object .NET

1 Answers1