Wednesday, January 09, 2013 8:59 PM
Are there any 'rules' when i should use an anonymous type over a custom type? From what ive read anonymous types and custom types are almost the same but can cause bugs. That said some recommend using custom types when you know what data you require from multiple tables?
Could anyone clarify or give some pointers?
Wednesday, January 09, 2013 9:49 PM
In general, I only recommend using anonymous types if you're going to use the results within the same method. If you're going to "persist" or pass the data into another method, display it, etc - I'd make a custom type.
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- Proposed As Answer by Fernando Soto - MCSDMicrosoft Community Contributor Thursday, January 10, 2013 4:56 PM
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Thursday, January 10, 2013 3:53 PM
When you have your object model in your project, generally you are operating with the references of this objects, but there are some case scenarios when you need a type of object which is little bit different rather your classes. var keyword can help you create your custom object, or even list of custome objects as anonymous type without additional coding or operations.
Also anonymous types are used to shorten your code: for example instead of
Dictionary<string, List<int, string>> x = new Dictionary<string, List<int, string>>();
you can do
var x = new Dictionary<string, List<int, string>>();
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Thursday, January 10, 2013 4:14 PM
Annonymous types generally are used in LINQ queries and the resultset we use in that function itself.
When you need collection of specific type then you should use Custom type.
For more information about the scenario when to use annonymous types please visit this link :
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