Public NotInheritable Class UserSettingsSubSection 
   Inherits System.Configuration.ConfigurationElement

public sealed class UserSettingsSubSection : System.Configuration.ConfigurationElement 

UserSettingsSubSection section = new UserSettingsSubSection();

section.Name = "a";
Assert.AreEqual("a", section.Name);

Assert.IsNotNull(section.Settings);

Assert.IsNull(section["a"]);
section["a"] = "b";
Assert.AreEqual("b", section["a"]);
section["a"] = "c";
Assert.AreEqual("c", section["a"]);

UserSettingsSubSection section2 = new UserSettingsSubSection();
section2.Name = "b";
Assert.AreNotEqual(0, section.CompareTo(section2));
section2.Name = "a";
Assert.AreEqual(0, section.CompareTo(section2));

section["a"] = "b";
section.Settings.Add("hello", "world");
section2.Settings.Add("hello", "universe");
Assert.AreEqual("universe", section2["hello"]);

section2.CopyFrom(section);
Assert.AreEqual("b", section2["a"]);
Assert.AreEqual("world", section2["hello"]);

Dim section As New UserSettingsSubSection()

section.Name = "a"
Assert.AreEqual("a", section.Name)

Assert.IsNotNull(section.Settings)

Assert.IsNull(section("a"))
section("a") = "b"
Assert.AreEqual("b", section("a"))
section("a") = "c"
Assert.AreEqual("c", section("a"))

Dim section2 As New UserSettingsSubSection()
section2.Name = "b"
Assert.AreNotEqual(0, section.CompareTo(section2))
section2.Name = "a"
Assert.AreEqual(0, section.CompareTo(section2))

section("a") = "b"
section.Settings.Add("hello", "world")
section2.Settings.Add("hello", "universe")
Assert.AreEqual("universe", section2("hello"))

section2.CopyFrom(section)
Assert.AreEqual("b", section2("a"))
Assert.AreEqual("world", section2("hello"))