C# Anonymous Type

Question

When I say Anonymous Type Declaration

var someType = new { Name = "Jon Skeet", Age = 10 };

However the Keyword

var is  implicitly typed

but when i print

Response.Write(someType.GetType().Name);

it produces <>f__AnonymousType02.What is this symbol <> relates to?

Though the type logically does not have a name, the metadata format does not permit nameless types, so we just pick an "impossible" name. You'll note that we do the same thing for anonymous functions. If you're clever, you can get the method info for an anonymous function and ask its name; you'll get a similar "impossible" name back. We also generate impossible names for closures, special fields of iterator blocks, and so on. — Eric Lippert
– Eric Lippert, Commented Dec 14, 2009 at 18:53
I hope you are in compiler development team @ Microsoft.Right ? — Russel
– Russel, Commented Dec 14, 2009 at 19:04

Daniel Brückner · Accepted Answer · 2009-12-14 18:39:57Z

12

The compiler generates a regular class for your anonymous type and chooses a name that is valid in IL but not in C# to prevent name conflicts with your type names.

answered Dec 14, 2009 at 18:39

Daniel Brückner

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ChrisV · Accepted Answer · 2009-12-14 18:40:59Z

1

It's part of the type name. It doesn't mean anything specific, but uses a sequence of characters that is unlikely to conflict with any human-written code.

answered Dec 14, 2009 at 18:40

ChrisV

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