nullable types

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

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

With the latest standard of the C # language, it now also provides support for nullable types. This small change will be very useful when dealing with database records that include optional options. Of course elsewhere, it's also very useful.In

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.

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

As the latest standard for C # language is released, it now provides support for nullable types. This small change will be useful when dealing with database records that include optional options. In other places, of course, it's also very

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

By default, there are only two types of C #:1. Nullable type: (Refers to nullable)Most of the objects, such as: dog dog = null;2. Non-nullable type:Basic value type, Boolean type, such as: int a = 0;//correctint a = null;//error3. Non-nullable

In C #1. X, a value type variable cannot be assigned a null value. Otherwise, an exception occurs. In C #2.0, Microsoft provides the nullable type, which allows you to define data types that contain null values (that is, null values, this is helpful