C # Explicit and implicit

explicit and implicit are used to declare user-defined type conversion operators , and if you can ensure that the conversion process does not result in data loss, you can use these two keywords to convert between a user-defined type and another type.

Explicit (Explicit, obvious: explicit)

Implicit (implied, implied: implicit)

1. What problems do they solve?

Consider the following requirements, the person class has a field of age. What if I want to create a person object with age 18 using person P = (person) 18来?

Further, I want to use person P = 18来 to create a person object with age 18, what should I do?

2, using explicit (explicit) and implicit (implicit)

classperson{Private intAge Public intAge {get {returnAge } set {age =value; }    } Public Static Explicit operatorPerson (intAge) {return NewPerson () {age = Age,}; }//public static implicit operator person (int.)    //{    //return new person () {age = Age,};    //}}classprogram{Static voidMain (string[] args) {person p = (person) 18;//Call explicit        //person p = 18;//Call implicit}}

Note: Neither can be provided at the same time, or compile errors. This syntax is in fact borrowed from the C + + approach, and has been extended. In general, do not use this type of conversion because it is not intuitive.

Reference: Https://msdn.microsoft.com/zh-cn/library/z5z9kes2.aspx

Http://www.cnblogs.com/nzbbody/p/3519688.html

C # Explicit and implicit