FileNotFoundException: Could not load file or assembly 'System.Configuration.ConfigurationManager

[MelCalucin]

I've downloaded dotnet_connector_30_tutorial and loaded the files into Visual Studio Community 2022.

I've got it to run up to this point:

But when I select 3, I get the following error:

Any clues on what I'm missing or did wrong?

Thanks.

Regards,

Mel Calucin

[Ulrich_Schmidt]

Hello Mel,

if RfcConfigParameters.LoadConfiguration() throws an exception, one possible error cause could be an error in the App.config file, e.g., invalid XML syntax.

I recently had the same problem, when I added a <startup> tag in the wrong location. The following throws the exception you are getting:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
	<startup>
		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
	</startup>
	<configSections>
		...
	</configSections>
	<SAP.Middleware.Connector>
		// ... Logon parameters for NCo
	</SAP.Middleware.Connector>
</configuration>

After I moved the <startup> section to the end, the App.config loaded successfully:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
	<configSections>
		...
	</configSections>
	<SAP.Middleware.Connector>
		// ... Logon parameters for NCo
	</SAP.Middleware.Connector>
	<startup>
		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
	</startup>
</configuration>

(So much for "position independend" XML format...)

Best Regards, Ulrich