difference between decimal? and System.Nullable

Question

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C# Nullable<int> vs. int?: Is there any difference?

When using NMG( Nhibernate Mapping generator) when the nullable type are converted I got them as System.Nullable<decimal> whereas by using Visual Nhibernate trail pack I got the nullable types as decimal?

I know what is decimal? does, it is accepted with out throwing errors in case of null values in non-technical terms.

But I could not find out if there is any difference between decimal? and System.Nullable<decimal> or not?

Isn't it just a shorthand alias? – canon Jun 22 '12 at 18:41 — canon, Jun 22 '12 at 18:41

Jon Senchyna · Answer 1 · 2012-06-22T18:49:28.620

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From MSDN - Nullable Types (C# Programming Guide)

The syntax T? is shorthand for System.Nullable<T>, where T is a value type. The two forms are interchangeable.

edited Jun 22 '12 at 18:49

answered Jun 22 '12 at 18:44

Jon Senchyna

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score 1 · Answer 2 · answered Jun 22 '12 at 18:43

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no difference. decimal? is converted to Nullable<decimal> at compile time. It can say syntactic sugar

answered Jun 22 '12 at 18:43

Govind Malviya

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score 1 · Answer 3 · edited May 23 '17 at 11:56

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decimal? is a short way of doing System.Nullable this is already answered at ? (nullable) operator in C#

hope it helps..

edited May 23 '17 at 11:56

Community

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answered Jun 22 '12 at 18:51

HatSoft

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score 0 · Answer 4 · answered Jun 22 '12 at 18:42

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There is no difference between both. type? is only a shortcut notation.

answered Jun 22 '12 at 18:42

Piotr Perak

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difference between decimal? and System.Nullable

4 Answers4