Csharp Microsoft. SQLServer. Types(106.1000.6)在try 从用户定义的类型检索值时引发异常

try 从System.Data.SQLClient迁移出go ，在处理用户定义类型时，我们遇到了使用SQLGeography对象的操作障碍. 简而言之，我可以在一个简单的SQLDataRecord构造中设置和检索序号值，但是检索值返回以下异常:

Value cannot be null. (Parameter 'key')

堆栈跟踪:

at System.ThrowHelper.ThrowArgumentNullException(String name)
at System.Collections.Concurrent.ConcurrentDictionary\`2.TryGetValue(TKey key, TValue& value)
at Microsoft.Data.SqlClient.Server.SerializationHelperSql9.GetSerializer(Type t)
at Microsoft.Data.SqlClient.Server.SerializationHelperSql9.Deserialize(Stream s, Type resultType)
at Microsoft.Data.SqlClient.Server.ValueUtilsSmi.GetUdt_LengthChecked(SmiEventSink_Default sink, ITypedGettersV3 getters, Int32 ordinal, SmiMetaData metaData)
at Microsoft.Data.SqlClient.Server.ValueUtilsSmi.GetValue(SmiEventSink_Default sink, ITypedGettersV3 getters, Int32 ordinal, SmiMetaData metaData, Object context)
at Microsoft.Data.SqlClient.Server.ValueUtilsSmi.GetValue200(SmiEventSink_Default sink, SmiTypedGetterSetter getters, Int32 ordinal, SmiMetaData metaData, Object context)
at Microsoft.Data.SqlClient.Server.SqlDataRecord.GetValueFrameworkSpecific(Int32 ordinal)
at Microsoft.Data.SqlClient.Server.SqlDataRecord.GetValue(Int32 ordinal)
at SqlGeographyTest.Program.Main(String\[\] args) in C:\\source\\repos\\SqlServerTestError\\SqlServerTestError\\Program.cs:line 27

如果你知道我在哪里出错就太好了. 谢谢

再现问题的代码示例:

using Microsoft.Data.SqlClient.Server;
using Microsoft.SqlServer.Types;
using System.Data;

namespace SqlGeographyTest
{
    class Program
    {
        static void Main(string[] args)
        {
            SqlGeography geog = CreateGeographyPoint(40, 90);
            var md1 = new SqlMetaData("ID", SqlDbType.Int);
            var md2 = new SqlMetaData("geog", SqlDbType.Udt, typeof(SqlGeography), "geography");

            SqlMetaData[] metadata = [md1, md2];

            SqlDataRecord record = new SqlDataRecord(metadata);

            record.SetValues(1, geog);
            var checkValue = record.GetValue(0);
            var checkValue2 = record.GetOrdinal("geog");
            try
            {
                var checkValue3 = record.GetValue(1);
            }
            catch(Exception ex)
            {
                string errorMessage = ex.Message;
            }
        }

        public static SqlGeography CreateGeographyPoint(double longitude, double latitude)
        {
            var text = string.Format("POINT({0} {1})", longitude, latitude);
            var ch = new System.Data.SqlTypes.SqlChars(text);
            return Microsoft.SqlServer.Types.SqlGeography.STPointFromText(ch, 4326);
        }
    }
}

我希望返回的是SQLGeography对象，而不是抛出异常.