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实体框架插入更新问题!

我有实体框架的问题.特别是我不能做插入或更新操作.错误信息:

An error occurred while updating the entries. See the inner exception for details.System.Data.SqlClient.SqlException (0x80131904): The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.
The statement has been terminated.
 at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
 at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
 at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
 at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
 at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
 at System.Data.SqlClient.SqlDataReader.get_MetaData()
 at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
 at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) …
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linq entity entity-framework-4

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