nullable string

Introduction: In C # 2.0, nullable types are also introduced, nullable types are value types, but nullable types are value types that include NULL, and the following is a description of what the support for nullable types is in the next c#2.0 (I've

ObjectiveIn fact, the empty chain call does not have its name so strange, in short, is for Optional the optional type (using the question mark ? suffix) and the forced expansion type (using an exclamation point ! suffix) method of use. In the

Description: Nullable type, details: nullable type DirectoryI. IntroductionIi. syntax and usageIii. type conversion and OperationIv. packing and unpacking5. GetType () method6. ToString () method7. System. Nullable help class8. Syntactic sugar  I.

Warm reminder : The new C # 8 feature mentioned in this article has been proposed, but it does not mean that C # 8 will be released when it is officially published. This means that my notes may have been written in vain, and that you don't have to

Nullable Reference Types of C #8, Xin reminder: The C #8 new feature mentioned in this Article has passed the proposal, but it does not mean that C #8 will be released soon. This means that my notebook may be in vain, and you do not have to rush to

C # Nullable type (Nullable) C # Nullable type (Nullable) C # provides a special data type, nullable type (nullable type), nullable types can represent values within the normal range of their underlying value types, plus a null value. For

In program development, sometimes it takes a value type to be a nullable type, for example, in a database, we can set a datetime to NULL.Nullable types appear in C # 2.0, allowing value types to also be empty (null), and implementations of nullable

C # Nullable type (Nullable)C # provides a special data type,nullable type (nullable type), nullable types can represent values within the normal range of their underlying value types, plus a null value.For example,nullable variable can be assigned

Demo location: project model> orderinfo. Cs> private nullable authorizationnumber; Introduction to. net2.0 nullable type C #2.0 provides the nullable version for all value types that are generic-based and supported by simple syntax to solve

Reprinted please indicate the source: http://www.cnblogs.com/dzodzo/archive/2009/12/15/1624225.html Http://www.fsderno.com/pdf/complier1.pdf (PDF) Introduction The course on compilation principles is being written. To combat forgetting, write