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<div style='display: inline'> <h1 style='font-family: Malgun Gothic, Consolas; font-size: 20pt; color: #006699; text-align: center; font-weight: bold'>Microsoft.Data.SqlClient - Could not load file or assembly 'System.Security.Permissions, ...'</h1> <p> Microsoft.Data.SqlClient를 사용하던,<br /> <br /> <pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; background-color: #fbedbb; overflow: auto; font-family: Consolas, Verdana;' > <PackageReference Include="Microsoft.Data.SqlClient" Version="5.1.2" /> </pre> <br /> 프로젝트를 근래에 새로 빌드해 실행했더니 이런 오류가 발생합니다.<br /> <br /> <pre style='height: 400px; margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; background-color: #fbedbb; overflow: auto; font-family: Consolas, Verdana;' > System.IO.FileNotFoundException HResult=0x80070002 Message=Could not load file or assembly 'System.Security.Permissions, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified. Source=Microsoft.Data.SqlClient StackTrace: at Microsoft.Data.Common.ADP.LocalMachineRegistryValue(String subkey, String queryvalue) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\Common\AdapterUtil.Windows.cs:line 51 at Microsoft.Data.SqlClient.TdsParserStaticMethods.AliasRegistryLookup(String& host, String& protocol) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStaticMethods.cs:line 30 at Microsoft.Data.SqlClient.SqlInternalConnectionTds.ResolveExtendedServerName(ServerInfo serverInfo, Boolean aliasLookup, SqlConnectionString options) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:line 1875 at Microsoft.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:line 1480 at Microsoft.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:line 1428 at Microsoft.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling, String accessToken, DbConnectionPool pool) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:line 516 at Microsoft.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlConnectionFactory.cs:line 136 at Microsoft.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Common\src\Microsoft\Data\ProviderBase\DbConnectionFactory.cs:line 123 at Microsoft.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:line 731 at Microsoft.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:line 1761 at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:line 1216 at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:line 1132 at Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\ProviderBase\DbConnectionFactory.cs:line 122 at Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Common\src\Microsoft\Data\ProviderBase\DbConnectionInternal.cs:line 341 at Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Common\src\Microsoft\Data\ProviderBase\DbConnectionClosed.cs:line 39 at Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry, SqlConnectionOverrides overrides) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlConnection.cs:line 1844 at Microsoft.Data.SqlClient.SqlConnection.Open(SqlConnectionOverrides overrides) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlConnection.cs:line 1333 at Microsoft.Data.SqlClient.SqlConnection.Open() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\netcore\src\Microsoft\Data\SqlClient\SqlConnection.cs:line 1311 ...[생략]... </pre> <br /> 어쩔 수 없습니다. 오류 메시지에 따라, System.Security.Permissions 패키지를 새로 추가해야 합니다.<br /> <br /> <pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; background-color: #fbedbb; overflow: auto; font-family: Consolas, Verdana;' > Install-Package System.Security.Permissions -Version 6.0.0 </pre> </p><br /> <br /><hr /><span style='color: Maroon'>[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]</span> </div>
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