.net – 如何初始化Singleton？

有时需要使用一些辅助值初始化单例类.但我们不能“发布”它的构造函数.这是什么解决方法？

注意！
重载GetInstance或设置颜色不是我的想法.颜色应仅设置一次.我想确保MyPainter仅使用初始化颜色进行绘制.应该使用任何默认颜色.

为了更清楚,我提供了一个示例：

''' <summary>
''' Singleton class MyPainter
''' </summary>
Public Class MyPainter
  Private Shared _pen As Pen
  Private Shared _instance As MyPainter = Nothing

  Private Sub New()
  End Sub

  ''' <summary>
  ''' This method should be called only once, like a constructor!
  ''' </summary>
  Public Shared Sub InitializeMyPainter(ByVal defaultPenColor As Color)
    _pen = New Pen(defaultPenColor)
  End Sub


  Public Shared Function GetInstance() As MyPainter
    If _instance Is Nothing Then
      _instance = New MyPainter
    End If

    Return _instance
  End Function

  Public Sub DrawLine(ByVal g As Graphics, ByVal pointA As Point, ByVal pointB As Point)
    g.DrawLine(_pen, pointA, pointB)
  End Sub

End Class

谢谢.

如果你想在创建时只初始化一次,为什么不通过调用某个方法在构造函数中做到这一点,这会从某个地方提取参数？如果多次调用此初始化 – 将其转换为单独的方法,如setOptions.