WebC#登陆增删改查代码精.docx 《C#登陆增删改查代码精.docx》由会员分享，可在线阅读，更多相关《C#登陆增删改查代码精.docx（15页珍藏版）》请在冰豆网上搜索。 WebIf you need to be able to retrieve all of the elements in the case of it not being empty, then some of the answers here won't work, because the call to Any () on a non-rewindable enumerable will "forget" an element. You could take a different approach and turn nulls into empties: bool didSomething = false; foreach (var element in someEnumeration ??

Check if list is empty in C# - Stack Overflow

WebAdd element to null (empty) List Property null and an empty list are two different things: Adding an element to an empty list works fine, but if your property is null (as all reference-type properties are initially null ), you need to initialize it with an empty list first. hilary knight hockeydb

c# - Checking for empty or null JToken in a JObject - Stack Overflow

WebSep 5, 2013 · That not much of programming problem as it's a design issue, the reason .NET list object don't throw exceptions when they are empty is because there is a lot of cases where a empty list is an expectable and acceptable situation. If in the context the list you work with is never supposed to be empty then throw an exception (a custom one) WebFeb 25, 2016 · The wire format (defined by google - not inside my control!) only sends data for items.It makes no distinction between an empty list and a null list. So if there is no data to send - yes, the length is 0 (it is a very frugal format ;-p). WebOct 27, 2015 · Returning an empty list could considered a valid alternative, but not in the context of your method (eg. filtering another list with no valid item). A failed generation of random numbers seems to indicate a problem of the generation algorithm and should throw an exception, not an empty list. hilary kole - the judy garland project