you are creating a class named temperature the classcontains public field..., Basic,

Question:You are creating a class named Temperature. The Temperature class
contains a public field named F. The public field F represents a
temperature in degrees Fahrenheit. You need to ensure that users can
specify whether a string representation of a Temperature instance
displays the Fahrenheit value or the equivalent Celsius value. Which
code segment should you use?

A Public Class Temperature 
Implements IFormattable 
Public F As Integer 
Public Function ToString ( ByVal format As String, _ ByVal fp As IFormatProvider ) As String _ 
Implements IFormattable.ToString If (format = "F" Or format = Nothing) Then 
Return F.ToString () 
End If 
If format = "C" Then 
Return ((F - 32) / 1.8). ToString () 
End If 
Throw New FormatException ("Invalid format string") 
End Function End Class 
B Public Class Temperature
Implements ICustomFormatter 
Public F As Integer 
Public Function Format( ByVal formatString As String, _ ByVal arg as object, ByVal fp As
 IFormatProvider ) _ As String Implements ICustomFormatter.Format 
If formatString = "C" Then 
Return ((F - 32) / 1.8). ToString () 
End If 
If formatString = "F" Then Return arg.ToString () 
End If 
Throw New FormatException ("Invalid format string") 
End Function 
End Class 
C Public Class Temperature Public F As Integer Public Function ToString ( ByVal format As String, _ 
ByVal fp As IFormatProvider ) As String If format = "C" Then Return ((F - 32) / 1.8). ToString () 
Else 
Return Me.GetType (). ToString () 
End If 
End Function End Class 
D Public Class Temperature 
Public F As Integer 
Protected format As String Public Overrides Function ToString () As String 
If format = "C" Then 
Return ((F - 32) / 1.8). ToString () 
End If 
Return F.ToString () 
End Function End Class

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C Public Class Temperature Public F As Integer Public Function ToString ( ByVal format As String, _ ByVal fp As IFormatProvider ) As String If format = "C" Then Return ((F - 32) / 1.8). ToString () Else Return Me.GetType (). ToString () End If End Function End Class

D Public Class Temperature Public F As Integer Protected format As String Public Overrides Function ToString () As String If format = "C" Then Return ((F - 32) / 1.8). ToString () End If Return F.ToString () End Function End Class

A

C Public Class Temperature Public F As Integer Public Function ToString ( ByVal format As String, _
ByVal fp As IFormatProvider ) As String If format = "C" Then Return ((F - 32) / 1.8). ToString ()
Else
Return Me.GetType (). ToString ()
End If
End Function End Class

D Public Class Temperature
Public F As Integer
Protected format As String Public Overrides Function ToString () As String
If format = "C" Then
Return ((F - 32) / 1.8). ToString ()
End If
Return F.ToString ()
End Function End Class