C#如何将全局变量的写入限制为仅对其进行初始化的类（以便其他类只能读取它）？

正如标题所述，我正在寻找解决以下问题的方法：

namespace Test
{
    public partial class SetVariable : Form
    {
        public string test = "";

        public SetVariable()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            test = "test"
        }
    }
}

在第二种形式中，我想阅读它，但也想限制用户对变量进行任何更改（出于偶然或故意），因为所有变量都只能在SetVariable形式中设置，然后在计划的所有其他形式中使用

namespace Test
{
    public partial class GetVariable : Form
    {
        public GetVariable()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (SetVariable.test == "test")
            { //doSomething;}
            }
        }
    }
}

如果我将该变量设置为公共只读，那么我就不能按照应该写入的形式写入它。是否有另一种初始化全局变量的方法，该全局变量只能以其创建位置的形式进行更改？ 提前感谢。

更改：

public string test = "";

致：

---

另请参见。

将公共属性设置为私有

public partial class SetVariable : Form
{
  public string Test {get; private set;}

  //Just in case if you want to set value to Test property from other class.
  //If you want Test property readonly to other 
  //class you don't need this method.
  public void SetTest(string test)
  {
    Test = test;
  }
}

public class Main
{
  SetVariable sv = new SetVariable();
  sv.SetTest("Some Value"); //unwanted to scenario. Just in case if you want

  //read Test value
  string testValue = sv.Test; //allowed
  //set Test value
  sv.Test = "Other value"; //not allowed.
}

---

非常感谢你的回答，这对我以后的课程很有帮助。也谢谢你的例子=）祝你愉快。谢谢你的回答和进一步描述这个provate属性的其他帖子。祝您今天过得愉快

public partial class SetVariable : Form
{
  public string Test {get; private set;}

  //Just in case if you want to set value to Test property from other class.
  //If you want Test property readonly to other 
  //class you don't need this method.
  public void SetTest(string test)
  {
    Test = test;
  }
}

public class Main
{
  SetVariable sv = new SetVariable();
  sv.SetTest("Some Value"); //unwanted to scenario. Just in case if you want

  //read Test value
  string testValue = sv.Test; //allowed
  //set Test value
  sv.Test = "Other value"; //not allowed.
}