C #3.0 Get Set Default Value

I have previously introduced the default value of C #3.0 {Get; set;}. This article is based on it and adds some content.

. NET Framework 3.5 uses C #3.0, and C #3.0 has some new language features, one of which is quick attributes.

Previous statement:

Private int _ id = 0;
Public int ID
{
Get
{
Return _ id;
}
Set
{
_ Id = value;
}
}

C #3.0 can be abbreviated as follows:

Public int ID {Get; set ;}

C #3.0 {Get; set;} Default Value

This means the default value of {Get; set;} does not exist. We cannot manually specify the default value because the private self-segment does not exist. What is the default value of the system?

• For int type, the default value is 0;
• For Int? Type. The default value is null;
• For the bool type, the default value is false;
• For bool? Type. The default value is null;
• For the string type, the default value is null;
• For string? Type, haha. If this method is not used, errors may occur;
• For the datetime type, the default value is 0001-01-01 00:00:00;
• For datetime? Type. The default value is null;
• For the enum type, the default value is 0. If there is no Enum item of 0, it is still 0. For more information, see C # enumeration (Enum );
• For Enum? Type. The default value is null;
• For the class type, the default value is the reference of an uninstantiated object;
• For class? Type.

About type addition ?, Indicates that the value of this type can be null. For example, if int does not have a null value, add Int? It can be null.