该引用摘自:explicit(C# 参考)

该引用摘自:使用转换运算符(C# 编程指南)

仍以Student为例,取语文和数学成绩的和,不使用explicit

    class Student
{
/// <summary>
/// 语文成绩
/// </summary>
public double Chinese { get; set; } /// <summary>
/// 数学成绩
/// </summary>
public double Math { get; set; }
}

求和:

    class Program
{
static void Main(string[] args)
{
var a = new Student
{
Chinese = 90.5d,
Math = 88.5d
}; //a的总成绩 语文和数据的总分数
Console.WriteLine(a.Chinese + a.Math);
}
}

使用explicit

    class Student
{
/// <summary>
/// 语文成绩
/// </summary>
public double Chinese { get; set; } /// <summary>
/// 数学成绩
/// </summary>
public double Math { get; set; } public static explicit operator double(Student a)
{
return a.Chinese + a.Math;
}
}

求和:

    class Program
{
static void Main(string[] args)
{
var a = new Student
{
Chinese = 90.5d,
Math = 88.5d
}; //a的总成绩 语文和数据的总分数
Console.WriteLine((double)a);
}
}
05-08 15:14