[Solved] Why i can not use reference variable?

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You are trying to write execution code inside of a class.
Please close it in a method, or any other execution code block and it will be ok.

Following this article: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/class

A class can contain declarations of the following members:

  • Constructors
  • Constants
  • Fields
  • Finalizers
  • Methods
  • Properties
  • Indexers
  • Operators
  • Events
  • Delegates
  • Classes
  • Interfaces
  • Structs

I have added below some code to illustrate the usage from constructor, following the comments.

Hope this clarifies. Happy learning c#!

using System;

namespace LanguageFeatures.Models
{
    public class Product
    {
        //field
        private string name;

        //property
        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        public int Test { get; set; }

    }
    public class TestProperty
    {
        //constructor
        public TestProperty()
        {
            Product p = new Product { Name = "asd", Test = 1 };
            Console.WriteLine(p.Test.ToString());
        }
    }
}

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solved Why i can not use reference variable?