C# 在方法中声明一个类或结构
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Declare a class or struct inside a method
提问by Thorin Oakenshield
In C#, is it possible to declare a class or struct inside a method, as in C++?
在 C# 中，是否可以像在 C++ 中一样在方法中声明类或结构？
e.g. C++:
例如 C++：
void Method()
{
class NewClass
{
} newClassObject;
}
I have tried, but it's not allowing me to do so.
我试过了，但它不允许我这样做。
回答by erikkallen
You can create an anonymous type like so:
您可以像这样创建匿名类型：
var x = new { x = 10, y = 20 };
but other than that: no.
但除此之外：没有。
回答by mattytommo
You can declare them inside a classas your question states, but not inside a methodas your question title states. Something like:
您可以在类中声明它们作为您的问题所述，但不能在您的问题标题所述的方法中声明。就像是：
public class MyClass
{
public class MyClassAgain
{
}
public struct MyStruct
{
}
}
回答by Sleiman Jneidi
Yes, it is possible to declare a classinside a classand these are called inner classes
是的，可以声明一个classinside aclass并且这些被称为inner classes
public class Foo
{
public class Bar
{
}
}
and this how you can create an instance
以及如何创建实例
Foo foo = new Foo();
Foo.Bar bar = new Foo.Bar();
And within a method you can create an object of anonymoustype
在一个方法中，你可以创建一个anonymous类型的对象
void Fn()
{
var anonymous= new { Name="name" , ID=2 };
Console.WriteLine(anonymous.Name+" "+anonymous.ID);
}
