1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 

Option Strict On

Public Class Form1

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Dim a As New a
        Dim b As New a

        a.Name = "a name"
        b.Name = "a name"

        If b.Name Is a.Name Then
            Console.WriteLine("Equal")
        End If

        If b IsNot a Then
            Console.WriteLine("Not Equal")
        End If
    End Sub

    Private Class a
        Public Property Name As String
    End Class


    Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
        Dim a As String = "abc"
        Dim b As String = "abc"

        If a Is b Then
            Console.WriteLine("Equal")
        End If

        If Object.ReferenceEquals(a, b) Then
            Console.WriteLine("Equal")
        End If

        b = String.Copy(a) ' New Instance

        If a IsNot b Then
            Console.WriteLine("Not Equal")
        End If

        If Object.Equals(a, b) Then
            Console.WriteLine("Equal")
        End If
    End Sub
End Class