C# 两个字符串比较并储存差异

  Dim BeforeValue AS String = "123456789"
  Dim AfterValue AS String = "321465798"

  '用List储存差异下标，两者比对的值
  Dim differences As New List(Of (Index As Integer, Before As Char, After As Char))()
  For i As Integer = 0 To BeforeValue.Length - 1
      If BeforeValue(i) <> AfterValue(i) Then
         differences.Add((Index:=i, Before:=BeforeValue(i), After:=AfterValue(i)))
      End If
  Next

  '当有BeforeValue ，AfterValue 有差异时可循环拿到对应下标和值
  If differences.Count > 0 Then
     For Each diff In differences
         Dim diffIndex As Integer = diff.Index
         Dim diffBefore As String = diff.Before
         Dim diffAfter As String = diff.After
     Next
  End If