DynamoVisualProgramming.DynamoServices by Autodesk

<PackageReference Include="DynamoVisualProgramming.DynamoServices" Version="2.5.0.7186" />

 IExecutionSession

interface IExecutionSession
Represents a session object for current execution.
namespace Autodesk.DesignScript.Interfaces { internal interface IExecutionSession { IConfiguration Configuration { get; } string SearchFile(string filename); } }