what does "timespan?" mean in c#?

Question

what does the question mark mean at the end of the variable?

TimeSpan? begin = // bla bla bla

The coding language is c#

It´s a nullable type. It is not specific for TimeSpan but can be used on structs and primitive types. See http://msdn.microsoft.com/en-us/library/2cf62fcy(v=vs.80).aspx#Y100 — Lasse Espeholt, May 29 '11 at 13:37

score 12 · Accepted Answer · answered May 29 '11 at 13:36

12

This is Nullable type. It means that value of begin can be null or a timespan

TimeSpan? and Nullable<Timespan> is same thing

answered May 29 '11 at 13:36

Stecya

Thank you! :) Concise answer. – Shaokan May 29 '11 at 13:38
of course, but it requires 8 more minutes to accept an answer :) – Shaokan May 29 '11 at 13:42

LeftyX · Answer 2 · 2015-12-07T09:27:17.140

1

TimeSpan? means you're declaring a nullable type. A type which can support null values.

edited Dec 07 '15 at 09:27

answered May 29 '11 at 13:37

LeftyX

2 Answers2