How to get the value of a class member variable from its name as a string

Is there anyway to do this? Its like i have a class

public class TestClass
{
   public static string myString= "123";
}

I want to some how get the value 123 from myString. If i know the name myString and put it into a textbox1 then annother textbox2 shows me the value 123.

Tried something like this:

var textForUrl = TestClass.GetType().GetField(txtbox1.Text).GetValue(TestClass, null)

But not working, also, my variables are all located in a seperate .cs file.

>Solution :

To get field public static string myString = "123";

var textForUrl = typeof(TestClass).GetField("myString")?.GetValue(null);

To get property public static string { get; set; } myString = "123";

var textForUrl = typeof(TestClass).GetProperty("myString")?.GetValue(null);