SqlText threw an exception of type 'System.TypeInitializationException'

Hello

I’m using this simple statement to select some records from my db.

public static List<Rate> Get(TradingDB db, string id, ENUM_TIMEFRAME timeframe, DateTime fromDate)
        {
            try
            {
               var query = from row in db.Rates
                           where row.MarketId == id && row.Timeframe == timeframe.ToString() && row.TimeframeDate >= fromDate
                           orderby row.TimeframeDate descending
                           select row;

                return query.ToList();
            }
            catch (Exception e)
            {
                Logger.Print(ENUM_LOGGER.LOGGER_SQL, Helper.GetMethod(MethodBase.GetCurrentMethod()), e.Message);
                return new List<Rate>();
            }
        }

This statement have been working for month, but since some weeks?? it’s not working anylonger.

IMO there is something wrong with the datetime

Exception message:  '((LinqToDB.Linq.ExpressionQuery<DataModels.Rate>)query).SqlText' threw an exception of type 'System.TypeInitializationException' | string {System.TypeInitializationException}


Stack trace:    bei LinqToDB.Linq.Query`1.GetQuery(IDataContext dataContext, Expression& expr) in C:\projects\linq2db\Source\LinqToDB\Linq\Query.cs:Zeile 219.
   bei LinqToDB.Linq.ExpressionQuery`1.GetQuery(Expression& expression, Boolean cache) in C:\projects\linq2db\Source\LinqToDB\Linq\ExpressionQuery.cs:Zeile 84.
   bei LinqToDB.Linq.ExpressionQuery`1.get_SqlText() in C:\projects\linq2db\Source\LinqToDB\Linq\ExpressionQuery.cs:Zeile 53.

Steps to reproduce

[Table(Schema="dbo", Name="rates")]
	public partial class Rate
	{
		[Column("market_id"),      PrimaryKey(1), NotNull] public string   MarketId      { get; set; } // nvarchar(80)
		[Column("timeframe"),      PrimaryKey(2), NotNull] public string   Timeframe     { get; set; } // nvarchar(13)
		[Column("timeframe_date"), PrimaryKey(3), NotNull] public DateTime TimeframeDate { get; set; } // smalldatetime
		[Column("open_time"),                     NotNull] public DateTime OpenTime      { get; set; } // smalldatetime
		[Column("open_price"),                    NotNull] public decimal  OpenPrice     { get; set; } // numeric(18, 8)
		[Column("high_time"),                     NotNull] public DateTime HighTime      { get; set; } // smalldatetime
		[Column("high_price"),                    NotNull] public decimal  HighPrice     { get; set; } // numeric(18, 8)
		[Column("low_time"),                      NotNull] public DateTime LowTime       { get; set; } // smalldatetime
		[Column("low_price"),                     NotNull] public decimal  LowPrice      { get; set; } // numeric(18, 8)
		[Column("close_time"),                    NotNull] public DateTime CloseTime     { get; set; } // smalldatetime
		[Column("close_price"),                   NotNull] public decimal  ClosePrice    { get; set; } // numeric(18, 8)


	}


public static List<Rate> Get(TradingDB db, string id, ENUM_TIMEFRAME timeframe, DateTime fromDate)
        {
            try
            {
               var query = from row in db.Rates
                           where row.MarketId == id && row.Timeframe == timeframe.ToString() && row.TimeframeDate >= fromDate
                           orderby row.TimeframeDate descending
                           select row;

                return query.ToList();
            }
            catch (Exception e)
            {
                return new List<Rate>();
            }
        }

Thank you

Environment details

linq2db version: 2.7.4 Database Server: Windows Server 2016 Database Provider: MS Sql 2017 Operating system: Windows Server 2016 / Windows 10 .NET Framework: .NET Framework 4.7.2

[BLIZZARD123]

Ok finally I found a workaround. I’ve installed VS2017 and VS2019 on my pc. When I’m using VS19, I get the error message. When I switch back to VS17 it works properly. So I seems to be a flag/bug, which is quite new, in VS 2019.

Thank you for your really great support. I really enjoy using your library! fantastic product

[MaceWindu]

yep, it’s quite straightforward fix. Just replace all uses of ConcurrentBag with better collection