//
// 摘要:
// Tests that the value of the named element is within a circle (see $within and
// $center).
//
// 参数:
// name:
// The name of the element to test.
//
// centerX:
// The x coordinate of the origin.
//
// centerY:
// The y coordinate of the origin.
//
// radius:
// The radius of the circle.
//
// 返回结果:
// The builder (so method calls can be chained).
public static FilterDefinition <BsonDocument> WithinCircle(string name, double centerX, double centerY, double radius)
{
return(filter.GeoWithinCenter(name, centerX, centerY, radius));
}