Add "Application Name" connection string setting

[bgrainger]

SqlClient supports a Application Name connection string option that is visible in various server monitoring tools.

MySQL Workbench supports showing an application name via the program_name connection attribute.

We could add a connection string setting (default null) that, if set, is used to initialise that attribute.

Example requests for such a setting:

• https://stackoverflow.com/questions/51848391/add-application-name-in-mysql-connection-string/
• https://stackoverflow.com/questions/29947364/set-program-name-for-display-in-mysql-process-list

[bgrainger]

Npgsql also uses Application Name.

[bgrainger]

MySQL/J uses connectionAttributes=program_name:YOUR_NAME.

My inclination is not to support a Connection Attributes setting that allows the client to send arbitrary values to the server (and bear the burden of escaping them properly), but instead to add single-purpose settings (that may end up setting a connection attribute).

[bgrainger]

Added in 0.44.0.

[penguinawesome]

How to use this in the connection string?

[penguinawesome]

Is there a way to put this in the c# code level? Like we want to set it based on the current executable assembly name (since we have multiple web projs and services)

[bgrainger]

Use MySqlConnectionStringBuilder.ApplicationName.

[penguinawesome]

@bgrainger how can we use that? This is how we instantiate and create our connection:

MySqlConnection connection = new MySqlConnection(ConnectionString);

[penguinawesome]

@bgrainger we have tried using this on our code:

MySqlConnectionStringBuilder connStringSb = new MySqlConnectionStringBuilder(ConnectionString);

connStringSb.ApplicationName = "";

connection = new MySqlConnection(connStringSb.ToString());

Would this be okay? Would there be any performance issue? Every DB calls uses this method and it creates new instance of MySqlConnectionStringBuilder, setting the application name and creating new string via the ToString(), and create the new MySqlConnection,