Description:
Execute the following C# code:
var connection = new MySqlConnection("SSL Mode=None");
With MySql.Data 9.4.0, the code succeeds.
With MySql.Data 9.5.0, the following exception is thrown:
ArgumentException: Requested value 'None' was not found.
at System.Enum.TryParseByName[TStorage](RuntimeType enumType, ReadOnlySpan`1 value, Boolean ignoreCase, Boolean throwOnFailure, TStorage& result)
at System.Enum.TryParseByValueOrName[TUnderlying,TStorage](RuntimeType enumType, ReadOnlySpan`1 value, Boolean ignoreCase, Boolean throwOnFailure, TUnderlying& result)
at System.Enum.TryParse(Type enumType, ReadOnlySpan`1 value, Boolean ignoreCase, Boolean throwOnFailure, Object& result)
at System.Enum.Parse(Type enumType, String value, Boolean ignoreCase)
at MySql.Data.MySqlClient.MySqlBaseConnectionStringBuilder.<>c.<.cctor>b__1_2(MySqlBaseConnectionStringBuilder msb, MySqlConnectionStringOption sender, Object value)
at MySql.Data.MySqlClient.MySqlConnectionStringBuilder.set_Item(String keyword, Object value)
at System.Data.Common.DbConnectionStringBuilder.set_ConnectionString(String value)
at MySql.Data.MySqlClient.MySqlConnectionStringBuilder..ctor(String connectionString, Boolean isAnalyzed)
at MySql.Data.MySqlClient.MySqlConnection.set_ConnectionString(String value)
at MySql.Data.MySqlClient.MySqlConnection..ctor(String connectionString)
MySqlSslMode.None was marked as deprecated in 8.0.29 (https://dev.mysql.com/doc/relnotes/connector-net/en/news-8-0-29.html):
> The SslMode=none connection-option value is deprecated (marked obsolete) and is replaced with the SslMode=disabled connection-option value.
The option was removed from the source code in 9.5.0: https://github.com/mysql/mysql-connector-net/commit/4f8695844646cc3073b1e80037eeee12491838...
The 9.5.0 release notes (https://dev.mysql.com/doc/relnotes/connector-net/en/news-9-5-0.html) only mention:
> Removed the misspelled option, Prefered, from MySqlSslMode. (WL #17115)
How to repeat:
Execute the following C# code:
var connection = new MySqlConnection("SSL Mode=None");
Suggested fix:
Add an announcement to the 9.5.0 release notes at https://dev.mysql.com/doc/relnotes/connector-net/en/news-9-5-0.html:
* Removed the deprecated option, None, from MySqlSslMode.
© 2025, Oracle Corporation and/or its affiliates
Description: Execute the following C# code: var connection = new MySqlConnection("SSL Mode=None"); With MySql.Data 9.4.0, the code succeeds. With MySql.Data 9.5.0, the following exception is thrown: ArgumentException: Requested value 'None' was not found. at System.Enum.TryParseByName[TStorage](RuntimeType enumType, ReadOnlySpan`1 value, Boolean ignoreCase, Boolean throwOnFailure, TStorage& result) at System.Enum.TryParseByValueOrName[TUnderlying,TStorage](RuntimeType enumType, ReadOnlySpan`1 value, Boolean ignoreCase, Boolean throwOnFailure, TUnderlying& result) at System.Enum.TryParse(Type enumType, ReadOnlySpan`1 value, Boolean ignoreCase, Boolean throwOnFailure, Object& result) at System.Enum.Parse(Type enumType, String value, Boolean ignoreCase) at MySql.Data.MySqlClient.MySqlBaseConnectionStringBuilder.<>c.<.cctor>b__1_2(MySqlBaseConnectionStringBuilder msb, MySqlConnectionStringOption sender, Object value) at MySql.Data.MySqlClient.MySqlConnectionStringBuilder.set_Item(String keyword, Object value) at System.Data.Common.DbConnectionStringBuilder.set_ConnectionString(String value) at MySql.Data.MySqlClient.MySqlConnectionStringBuilder..ctor(String connectionString, Boolean isAnalyzed) at MySql.Data.MySqlClient.MySqlConnection.set_ConnectionString(String value) at MySql.Data.MySqlClient.MySqlConnection..ctor(String connectionString) MySqlSslMode.None was marked as deprecated in 8.0.29 (https://dev.mysql.com/doc/relnotes/connector-net/en/news-8-0-29.html): > The SslMode=none connection-option value is deprecated (marked obsolete) and is replaced with the SslMode=disabled connection-option value. The option was removed from the source code in 9.5.0: https://github.com/mysql/mysql-connector-net/commit/4f8695844646cc3073b1e80037eeee12491838... The 9.5.0 release notes (https://dev.mysql.com/doc/relnotes/connector-net/en/news-9-5-0.html) only mention: > Removed the misspelled option, Prefered, from MySqlSslMode. (WL #17115) How to repeat: Execute the following C# code: var connection = new MySqlConnection("SSL Mode=None"); Suggested fix: Add an announcement to the 9.5.0 release notes at https://dev.mysql.com/doc/relnotes/connector-net/en/news-9-5-0.html: * Removed the deprecated option, None, from MySqlSslMode.