How Can I Add Anonymous Classes to a Generic List in C#?

Creating a Generic List of Anonymous Classes

In C# 3.0, you can create anonymous classes using the following syntax:

var o = new { Id = 1, Name = "Foo" };

You might want to add these anonymous classes to a generic list, such as:

var o = new { Id = 1, Name = "Foo" };
var o1 = new { Id = 2, Name = "Bar" };

List list = new List();
list.Add(o);
list.Add(o1);

Or you might want to dynamically create and add anonymous classes to the list, such as:

List<var> list = new List<var>();

while (...)
{
    ...
    list.Add(new { Id = x, Name = y });
    ...
}

To achieve this, you can use type inference and call a generic method, either as an extension method or a custom method. Here are some examples:

// Using an extension method
var list = new[] { o, o1 }.ToList();

// Using a custom method
public static List<T> CreateList<T>(params T[] elements)
{
    return new List<T>(elements);
}

var list = CreateList(o, o1);

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