It is not possible to create two commands in parallel if they are assigned to one connection

[BoBiene]

 MySqlConnection connection = new MySqlConnection(/* ... */);
connection.Open(); ;

var cmd1 = connection.CreateCommand();
cmd1.CommandText = "SELECT 1";
using (var reader = cmd1.ExecuteReader())
{
    var cmd2 = connection.CreateCommand();
    cmd2.CommandText = "SELECT 1";  //should not fail

    //cmd2.Execute[..]() <- should fail
}

[bgrainger]

The test here is too strict; it really should only be checking whether there is an active reader for this MySqlCommand, not any command.

MySqlConnector/src/MySqlConnector/MySqlCommand.cs

Lines 182 to 183 in 058c7f5

	if (m_connection?.HasActiveReader ?? false)
	throw new InvalidOperationException("Cannot set MySqlCommand.CommandText when there is an open DataReader for this command; it must be closed first.");

[bgrainger]

I suspect this should be fixed by checking ServerSession.m_activeCommandId.

[bgrainger]

The fix is available as a pre-release, 1.0.1-beta.0.20, from GitHub Packages: https://github.com/mysql-net/MySqlConnector/packages/39735

[BoBiene]

Thank you @bgrainger 👍

[bgrainger]

Fixed in 1.0.1.