.Net MySql error “The given key was not present in the dictionary”

Question

Trying to get simple count from table results in exception bellow. Tried different select statemens which also makes exception: \"SELECT * FROM goods\", but \"<

Answer 1

I had same problem using .net core 2.1, mysql, nhibernate.

After i added "Allow User Variables=True" to connection string in appsettings.json my problem solved.