/// <summary>
/// 安全地读入数组字段
/// </summary>
/// <param name="bsonReader">Bson读取器</param>
/// <param name="expected">字段名</param>
/// <param name="read">字段名缓存</param>
/// <param name="parser">数组元素读取器</param>
/// <returns>读取结果</returns>
public static List <T> ReadArray <T>(this IBsonReader bsonReader, string expected, ref string read,
Func <IBsonReader, T> parser)
{
if (!ReadPrep(bsonReader, expected, ref read))
{
return(null);
}
var lst = new List <T>();
bsonReader.ReadStartArray();
while (!bsonReader.IsEndOfArray())
{
lst.Add(parser(bsonReader));
}
bsonReader.ReadEndArray();
return(lst);
}