有没有办法在c#中获取对调用对象的引用？

public class MyClass
{
    public int MyProperty { get; set; }
}

public static void Main(string[] args)
{
    MyClass obj = new MyClass();
    obj.MyProperty = 10;
    Console.WriteLine("Before: " + obj.MyProperty);
    ModifyMyClass(ref obj);
    Console.WriteLine("After: " + obj.MyProperty);
}

public static void ModifyMyClass(ref MyClass obj)
{
    obj.MyProperty = 20;
}