错误：Assets\\controls.cs(11,4)：错误 CS8803：顶级语句必须在命名空间和类型声明之前

Answer 1

在编写没有namespace 关键字的代码时，您需要始终将类和方法定义放在最底部，就像这样

using Some.Library;

// Code to be run

SomeClass ABC = new SomeClass(SomeParameter);
SomeMethod(ABC);
Console.WriteLine("Something Something Something");

// Method and class definitions

void SomeMethod(SomeClass class)
{
    ...
}

class SomeClass
{
    public SomeClass(Parameter something)
    {
        ...
    }
}