Implement IDisposable

Implements the IDisposable interface in the current class.

Availability

From the context menus or via shortcuts:

  • when the edit cursor or caret is on a declaration of a class containing IDisposable fields, provided that the class does not implement IDisposable.

Example

class FormDrawer
{
  private Graphics _CurrentGraphics;
  private Pen _DefaultPen;
  public FormDrawer(Form operatedForm)
  {
    _CurrentGraphics = operatedForm.CreateGraphics();
    _DefaultPen = new Pen(Color.Black);
  }
  public void DrawCircle(int centerX, int centerY, int radius)
  {
    _CurrentGraphics.DrawEllipse(_DefaultPen, centerX - radius, centerY - radius, radius * 2, radius * 2);
  }
  public void DrawCircle(int centerX, int centerY, int radius, Pen pen)
  {
    _CurrentGraphics.DrawEllipse(pen, centerX - radius, centerY - radius, radius * 2, radius * 2);
  }
}
Class FormDrawer
  Private _CurrentGraphics As Graphics
  Private _DefaultPen As Pen
  Public Sub New(ByVal operatedForm As Form)
    _CurrentGraphics = operatedForm.CreateGraphics()
    _DefaultPen = New Pen(Color.Black)
  End Sub
  Public Sub DrawCircle(ByVal centerX As Integer, ByVal centerY As Integer, ByVal radius As Integer)
    _CurrentGraphics.DrawEllipse(_DefaultPen, centerX - radius, centerY - radius, radius * 2, radius * 2)
  End Sub
  Public Sub DrawCircle(ByVal centerX As Integer, ByVal centerY As Integer, ByVal radius As Integer, ByVal pen As Pen)
    _CurrentGraphics.DrawEllipse(pen, centerX - radius, centerY - radius, radius * 2, radius * 2)
  End Sub
End Class

Result:

class FormDrawer : IDisposable
{
  private Graphics _CurrentGraphics;
  private Pen _DefaultPen;
  public FormDrawer(Form operatedForm)
  {
    _CurrentGraphics = operatedForm.CreateGraphics();
    _DefaultPen = new Pen(Color.Black);
  }
  public void DrawCircle(int centerX, int centerY, int radius)
  {
    _CurrentGraphics.DrawEllipse(_DefaultPen, centerX - radius, centerY - radius, radius * 2, radius * 2);
  }
  public void DrawCircle(int centerX, int centerY, int radius, Pen pen)
  {
    _CurrentGraphics.DrawEllipse(pen, centerX - radius, centerY - radius, radius * 2, radius * 2);
  }
  public void Dispose()
  {
    if (_CurrentGraphics != null)
    {
      _CurrentGraphics.Dispose();
      _CurrentGraphics = null;
    }
    if (_DefaultPen != null)
    {
      _DefaultPen.Dispose();
      _DefaultPen = null;
    }
  }
}
Class FormDrawer
  Implements IDisposable
  Private _CurrentGraphics As Graphics
  Private _DefaultPen As Pen
  Public Sub New(ByVal operatedForm As Form)
    _CurrentGraphics = operatedForm.CreateGraphics()
    _DefaultPen = New Pen(Color.Black)
  End Sub
  Public Sub DrawCircle(ByVal centerX As Integer, ByVal centerY As Integer, ByVal radius As Integer)
    _CurrentGraphics.DrawEllipse(_DefaultPen, centerX - radius, centerY - radius, radius * 2, radius * 2)
  End Sub
  Public Sub DrawCircle(ByVal centerX As Integer, ByVal centerY As Integer, ByVal radius As Integer, ByVal pen As Pen)
    _CurrentGraphics.DrawEllipse(pen, centerX - radius, centerY - radius, radius * 2, radius * 2)
  End Sub
  Public Sub Dispose(ByVal disposing As Boolean)
    If disposing Then
      If _CurrentGraphics IsNot Nothing Then
        _CurrentGraphics.Dispose()
        _CurrentGraphics = Nothing
      End If
      If _DefaultPen IsNot Nothing Then
        _DefaultPen.Dispose()
        _DefaultPen = Nothing
      End If
    End If
  End Sub
End Class