Convert list of one type to list of another type in C# 3.5

Question

I have an object, with ID and Name properties.

I have a list of the objects, but I want to convert it to a list of strings containing the name of the object. I'm guessing there's some fancy Linq method that will put the name of the object into the list.

List<string> myObjectNames = myObjectList.?

Mark Byers · Accepted Answer · 2010-08-24 11:00:08Z

19

If you know it is specifically a List<T> and not another collection type then you can use List<T>.ConvertAll:

Converts the elements in the current List<T> to another type, and returns a list containing the converted elements.

Example:

List<string> myObjectNames = myObjectList.ConvertAll(x => x.Name);

If you just know that it is an enumerable type but not necessarily a list then you can use the LINQ extension methods Enumerable<T>.Select and Enumerable<T>.ToList:

List<string> myObjectNames = myObjects.Select(x => x.Name).ToList();

edited Aug 24, 2010 at 11:00

answered Aug 24, 2010 at 10:54

Mark Byers

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2 Comments

Hans Passant Over a year ago

You probably ought to mention the Cast extension method?

this.myself Over a year ago

The Cast<T>() extension method does the thing written in the questions title (like converting a list of strings to a list of integers). But it does not fit the example in the question...

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