c# - 为什么 C# 允许在非静态构造函数中初始化静态类变量？

Question

为什么 C# 允许在非静态构造函数中初始化静态类变量？静态变量只允许在静态构造函数上初始化。有任何想法吗？

 public class customer
{
    public string Name;

    public customer()
    {
        Name = "C1";
        Console.WriteLine("creating customer " + Name);
    }

}

class Program
{
    public static customer cust;

    public Program()
    {
        cust = new customer(); //Why is this allowed i.e. initialize a static variable in non-static constructor?
    }

    static void Main(string[] args)
    {
        Program program = new Program();
        program = new Program();

        Console.Read();
    }
}

Answer 1

不要把它看成初始化，把它看成设置。

如果您只想通过静态构造函数或在声明时对其进行初始化，请添加 readonly 关键字。

例如

public readonly static customer cust;

//Allowed
static Program()
{
    cust = new customer(); 
}

//Not Allowed
public Program()
{
    cust = new customer();
}