Introscope.agent.application.name is not supported in .Net/.Net Core Agent. For a workaround, capture the application name within the agent name. The agent name for .Net and Java should allow blanks. For both agents , you can set via com.wily.introscope.agent.agentName
Additional Information
An enhancement to support introscope.agent.application.name for .Net/.Net Core Agent is underway.