A part of vb.net code

<Serializable()> _
Public Class Test
    Implements ITest


    Public Property kommaZahl() As Double Implements ITest.kommaZahl
        Get
            Return 1.2
        End Get
        Set(ByVal value As Double)

        End Set
    End Property

    Public Property wort() As String Implements ITest.wort
        Get
            Return "test"
        End Get
        Set(ByVal value As String)

        End Set
    End Property

    Public Property zahl() As Integer Implements ITest.zahl
        Get
            Return 123
        End Get
        Set(ByVal value As Integer)

        End Set
    End Property
End Class

Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        Try
            If disposing AndAlso components IsNot Nothing Then
                components.Dispose()
            End If
        Finally
            MyBase.Dispose(disposing)
        End Try
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        components = New System.ComponentModel.Container()
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.Text = "Form1"
    End Sub

End Class