无法从MongoDb C#中的BsonType ObjectId反序列化字符串

我在C#WebAPI 中尝试从MongoDb获取所有记录时遇到错误"Cannot deserialize string from BsonType ObjectId"

我的Id是

[BsonId]
public string Id { get; set; }

更改为后

[BsonRepresentation(BsonType.ObjectId)] 
public string Id { get; set; }

其工作良好的

但是当我调用post方法时，它给了我不同的错误

"'d05e139c-3a48-4213-bd89-eba0c22c3c6f' is not a valid 24 digit hex string."

如何解决这个问题

我的型号是：

public class EstablishmentDetails
{
    [BsonRepresentation(BsonType.ObjectId)] 
    public string Id { get; set; }
    public string EstablishmentName { get; set; }
    public string EstablishmentType { get; set; }
    public string Address { get; set; }
    public string City { get; set; }
    public int StateID { get; set; }
    public Int32 PIN { get; set; }
    public Int64 PhoneNumber { get; set; }
    public string EmailID { get; set; }
    public bool Published { get; set; }
    public string CreatedDate { get; set; }
    public string ModifiedDate { get; set; }
}

我的获取方法的存储库

public IEnumerable<EstablishmentDetails> GetAllEstablishmentDetails()
    {
        if (Convert.ToInt32(mCollection.Count()) > 0)
        {
            var EstablishmentDetailsCollection = mCollection.FindAllAs(typeof(EstablishmentDetails));
            if (EstablishmentDetailsCollection.Count() > 0)
            {
                foreach (EstablishmentDetails item in EstablishmentDetailsCollection)
                {
                    establishmentDetails.Add(item);
                }
            }
        }
        var results = establishmentDetails.AsQueryable();
        return results;
    }

我的Post方法存储库

public EstablishmentDetails Add(EstablishmentDetails ed)
    {
        if (string.IsNullOrEmpty(ed.Id))
        {
            ed.Id = Guid.NewGuid().ToString();
        }
        mCollection.Save(ed);
        return ed;
    }