public void GetInfo_Dimension(Dimension dimension)
{
    string message = "Dimension : ";
    // Get Dimension name
    message += "\nDimension name is : " + dimension.Name;

    // Get Dimension Curve
    Autodesk.Revit.DB.Curve curve = dimension.Curve;
    if (curve != null && curve.IsBound)
    {
        // Get curve start point
        message += "\nCurve start point:(" + curve.GetEndPoint(0).X + ", "
             + curve.GetEndPoint(0).Y + ", " + curve.GetEndPoint(0).Z + ")";
        // Get curve end point
        message += "; Curve end point:(" + curve.GetEndPoint(1).X + ", "
             + curve.GetEndPoint(1).Y + ", " + curve.GetEndPoint(1).Z + ")";
    }

    // Get Dimension type name
    message += "\nDimension type name is : " + dimension.DimensionType.Name;

    // Get Dimension view name
    message += "\nDimension view name is : " + dimension.View.Name;

    // Get Dimension reference count
    message += "\nDimension references count is " + dimension.References.Size;

    if (BuiltInCategory.OST_Dimensions == dimension.Category.BuiltInCategory)
    {
        message += "\nDimension is a permanent dimension.";
    }
    else if (BuiltInCategory.OST_Constraints == dimension.Category.BuiltInCategory)
    {
        message += "\nDimension is a constraint element.";
    }


    TaskDialog.Show("Revit",message);
}

Public Sub GetInfo_Dimension(dimension As Dimension)
   Dim message As String = "Dimension : "
   ' Get Dimension name
   message += vbLf & "Dimension name is : " + dimension.Name

   ' Get Dimension Curve
   Dim curve As Autodesk.Revit.DB.Curve = dimension.Curve
   If curve IsNot Nothing AndAlso curve.IsBound Then
      ' Get curve start point
      message += vbLf & "Curve start point:(" + curve.GetEndPoint(0).X + ", " + curve.GetEndPoint(0).Y + ", " + curve.GetEndPoint(0).Z + ")"
      ' Get curve end point
      message += "; Curve end point:(" + curve.GetEndPoint(1).X + ", " + curve.GetEndPoint(1).Y + ", " + curve.GetEndPoint(1).Z + ")"
   End If

   ' Get Dimension type name
   message += vbLf & "Dimension type name is : " + dimension.DimensionType.Name

   ' Get Dimension view name
   message += vbLf & "Dimension view name is : " + dimension.View.Name

   ' Get Dimension reference count
   message += vbLf & "Dimension references count is " + dimension.References.Size

   If BuiltInCategory.OST_Dimensions = dimension.Category.BuiltInCategory Then
      message += vbLf & "Dimension is a permanent dimension."
   ElseIf BuiltInCategory.OST_Constraints = dimension.Category.BuiltInCategory Then
      message += vbLf & "Dimension is a constraint element."
   End If


   TaskDialog.Show("Revit", message)
End Sub