Please can any one advise me if it is possible to decalre a custom structure that can be assigned Nothing and / or Db开发者_开发问答Null.Values, and also can be instanciated as Nothing?
This question already has answers here: Closed 12 years ago. Possible Duplicate: Adding null to a List<bool?> cast as an IList throwing an exception.
What is the recommended way in this situation: Customer ..* <-------------> 0..1 Car So there is a Customer table and a Car table, Customer can have zero or one Car, the Car can be link开发者
The C# 4.0 compiler does not complain about this (not even a 开发者_高级运维warning): if(10.0 > null + 1)
Something just occurred to me earlier today that has got me scratching my head. Any variable of type Nullable<T> can be assigned to null. For instance:
This function loops all properties of an object to create the updatequery to save te object to the DB.
I have a collection of nullable ints. Why does compiler allows to iteration variable be of type int not int? ?
So I\'ve got some code that passes around this anonymous object between methods: var promo = new { Text = promo.Value,
Can someone explain what开发者_Python百科 is going on here? Howcome both these things are true? [TestMethod]
In SQL server, do null values occupy less space than non-null values, or is null represented as a flag indicating that no value is stored (and thus actually requiring MORE space to store null values).
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