为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
【DM版本】:DM V8
【操作系统】：WINDOWS 64位
【CPU】:inter
【问题描述】*：做数据迁移时，MSSQL数据库的datetimeoffset类型在DM V8中应该是什么格式的数据，C# entityframeworkcore在做映射时报错？选择了DATETIME WITH TIME ZONE，TIMESTAMP WITH LOCAL TIME ZONE，均报错如下：
Specified cast is not valid.
at Dm.DmDateTime.DmTimeFromRec4(Byte[] dateTime, Int32 CType)
at Dm.DmGetValue.GetTimestamp(Int32 i, Byte[] val, Int32 CType, Int32 prec, Int32 scale)
at Dm.DmDataReader.do_GetDateTime(Int32 i)
at Dm.DmDataReader.GetDateTime(Int32 i)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable1.AsyncEnumerator.<MoveNextAsync>d__17.MoveNext() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.ValueTaskAwaiter1.GetResult()
at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.<SingleOrDefaultAsync>d__221.MoveNext() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.<SingleOrDefaultAsync>d__221.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult() at Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory2.<GenerateClaimsAsync>d__5.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult() at Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory1.<CreateAsync>d__9.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult() at Microsoft.AspNetCore.Identity.SignInManager1.<CreateUserPrincipalAsync>d__26.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult() at Microsoft.AspNetCore.Identity.SignInManager1.<SignInWithClaimsAsync>d__33.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Identity.SignInManager1.<SignInOrTwoFactorAsync>d__59.MoveNext() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult()
at Microsoft.AspNetCore.Identity.SignInManager1.<PasswordSignInAsync>d__38.MoveNext() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult()
at SpecialHealthSystem.WebUI.Controllers.AccountController.<Login>d__11.MoveNext() in AccountController.cs:line 112