//
 // 摘要:
 //     Tests that the value of the named element is within a polygon (see $within and
 //     $polygon).
 //
 // 参数:
 //   name:
 //     The name of the element to test.
 //
 //   points:
 //     An array of points that defines the polygon (the second dimension must be of
 //     length 2).
 //
 // 返回结果:
 //     The builder (so method calls can be chained).
 public static FilterDefinition <BsonDocument> WithinPolygon(string name, double[,] points)
 {
     return(filter.GeoWithinPolygon(name, points));
 }