如何从方法中实例化全局或公共对象？C#

public static class GlobalObject
{
    public static string Name { get; set; }
    public static int Age { get; set; }
}

public class SingletonObject
{
    private static SingletonObject instance;

    public static SingletonObject Instance
    {
        get
        {
            if (instance == null)
            {
                instance = new SingletonObject();
            }
            return instance;
        }
    }

    public string Name { get; set; }
    public int Age { get; set; }
}

public class MyService
{
    private readonly GlobalObject globalObject;

    public MyService(GlobalObject globalObject)
    {
        this.globalObject = globalObject;
    }

    public void DoSomething()
    {
        // 使用全局对象
        string name = globalObject.Name;
        int age = globalObject.Age;

        // 执行其他操作
    }
}