FMOD.Geometry.FMOD_Geometry_AddPolygon C# (CSharp) Method

        private static extern RESULT FMOD_Geometry_AddPolygon           (IntPtr geometry, float directocclusion, float reverbocclusion, bool doublesided, int numvertices, VECTOR[] vertices, out int polygonindex);
        [DllImport(VERSION.dll)]

 public RESULT addPolygon(float directOcclusion, float reverbOcclusion, bool doubleSided, int numVertices, ref VECTOR vertices, ref int polygonIndex)
 {
     return(Geometry.FMOD_Geometry_AddPolygon(geometryraw, directOcclusion, reverbOcclusion, doubleSided, numVertices, ref vertices, ref polygonIndex));
 }