public static SketchPlane CreateSketchPlane(Autodesk.Revit.DB.Document document, Plane plane)
{
    SketchPlane sketchPlane = null;

    // create a sketch plane using Geometry.Plane
    sketchPlane = SketchPlane.Create(document, plane);

    // throw exception if creation failed
    if (null == sketchPlane)
    {
        throw new Exception("Create the sketch plane failed.");
    }

    return sketchPlane;
}

Public Shared Function CreateSketchPlane(document As Autodesk.Revit.DB.Document, plane As Plane) As SketchPlane
    Dim sketchPlane__1 As SketchPlane = Nothing

    ' create a sketch plane using Geometry.Plane
    sketchPlane__1 = SketchPlane.Create(document, plane)

    ' throw exception if creation failed
    If sketchPlane__1 Is Nothing Then
        Throw New Exception("Create the sketch plane failed.")
    End If

    Return sketchPlane__1
End Function