The package "Hafner.Tools.Settable.Dapper" is a Dapper extension to handle conversions from Dapper to Settable<T> correctly. There are two functionally identical methods that may be called: Either you invoke the extension method that appears on the connection (IDbConnection) like this before every call of a dapper extension method (preferred if you don't have an application's entry point e.g. because it's a library): connection.EnsureSettableConvertersLoaded(); or you call method once when the application is starting up (multiple calls are ignored and do not affect performance negatively): SettableExtensionForDapper.LoadConverters();
$ dotnet add package Hafner.Tools.Settable.DapperNo README available.