query: what is the use of ?? in c#
positive_passages.docid: 87305
positive_passages.text: What do two question marks together mean in C#?
negative_passages.docid: 1091
negative_passages.text: Use of var keyword in C#
negative_passages.docid: 83756
negative_passages.text: What's the difference betwen " and ' - and when to use it?
negative_passages.docid: 2320
negative_passages.text: Why not use "which"? What to use then?
negative_passages.docid: 147417
negative_passages.text: What does "DateTime?" mean in C#?
negative_passages.docid: 71529
negative_passages.text: What is this operator: &=
negative_passages.docid: 4442
negative_passages.text: What is the { get; set; } syntax in C#?
negative_passages.docid: 140432
negative_passages.text: What does  denote in C#
negative_passages.docid: 29914
negative_passages.text: What is the difference between  and ?
negative_passages.docid: 62718
negative_passages.text: What's the @ in front of a string in C#?
negative_passages.docid: 22122
negative_passages.text: How do you use the ? : (conditional) operator in JavaScript?
negative_passages.docid: 96006
negative_passages.text: What does the ??!??! operator do in C?
negative_passages.docid: 38168
negative_passages.text: What is the Java ?: operator called and what does it do?
negative_passages.docid: 70140
negative_passages.text: Is there a VB.net equivalent for C#'s ! operator?
negative_passages.docid: 157441
negative_passages.text: What's the use of which?
negative_passages.docid: 140931
negative_passages.text: What is the difference between if(!!condition) and if(condition)
negative_passages.docid: 23756
negative_passages.text: Why does one often see "null != variable" instead of "variable != null" in C#?