AutoCAD Civil 3D :: Creating Section View

When I created Section View  it gave me an exception of type Text saying that there is incorrect parameter, my code is:

double[] origin = new double[2];
origin[0] = bp.X;
origin[1] = bp.Y;
string strn =""; 
AeccSectionViewStyle asvs = g_civil3ddoc.SectionViewStyles[0]
AeccSectionViewBandStyleSet bandstyle = g_civil3ddoc.SectionViewBandStyleSets[0];
foreach (AeccSampleLine asam inslg.SampleLines)
{
   strn ="sv "+asam.Name; 
       asam.SectionViews.Add(strn, "0", origin, asvs, bandstyle);
      origin[0] += 500;
}

while bp is a selected point (point3d type).