将VBA select case转换为C#

Sub ConvertToCSharp()
    Dim fruit As String
    fruit = "apple"
    
    Select Case fruit
        Case "apple"
            MsgBox "This is an apple."
        Case "banana"
            MsgBox "This is a banana."
        Case "orange"
            MsgBox "This is an orange."
        Case Else
            MsgBox "Unknown fruit."
    End Select
End Sub

using System;

class ConvertToCSharp
{
    static void Main(string[] args)
    {
        string fruit = "apple";
        
        switch (fruit)
        {
            case "apple":
                Console.WriteLine("This is an apple.");
                break;
            case "banana":
                Console.WriteLine("This is a banana.");
                break;
            case "orange":
                Console.WriteLine("This is an orange.");
                break;
            default:
                Console.WriteLine("Unknown fruit.");
                break;
        }
    }
}