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#? — nawfal
– nawfal, Commented Jul 20, 2014 at 6:23

SLaks · Accepted Answer · 2011-07-14 19:39:11Z

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, 2011 at 19:39

SLaks

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3 Comments

Alexander Beletsky Over a year ago

ExpandoObject, now my favorite object of .NET :)

SLaks Over a year ago

Do not overuse ExpandoObject. Don't abandon compile-time type-safety unless you really need to.

Tim Schmelter Over a year ago

Actually found a Skeet-Link to this topic: stackoverflow.com/questions/1394117/…

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