Parameter values are ignored if MySqlParameterCollection.Insert is used.

[xtomik]

If MySqlParameter is inserted into MySqlCommand.Parameters collection using MySqlParameterCollection.Insert, then the MySqlParameter.Value is not used.

var command = connection.CreateCommand();
var parameter = new MySqlParameter("@Id", MySqlDbType.Int32);
command.Parameters.Insert(0, parameter); 
parameter.Value = 5;
command.CommandText = "SELECT @Id";
var value = command.ExecuteScalar(); // returns DBNull

[bgrainger]

Pre-release fix available in 1.0.1-beta.0.22 at GitHub Packages: https://github.com/mysql-net/MySqlConnector/packages/39735

[bgrainger]

Fixed in 1.0.1.