问如何在MVC/EF/LINQ中执行存储过程并获得返回结果

EN

 CREATE PROCEDURE dbo.StoredProcedure2 AS
     declare @parameter2 int
     SET @parameter2 = 4

     RETURN @parameter2 

 private readonly TestDatastoreContext _context = new TestDatastoreContext();

 public ViewResult Index(string id)
 {
        ViewData["EnvironmentId"] = id;

        using (_context)
        {
            _context.Database.Connection.Open();
            var command = _context.Database.Connection.CreateCommand();
            command.CommandText = "dbo.StoredProcedure2";
            command.CommandType = System.Data.CommandType.StoredProcedure;
            var test = (command.ExecuteScalar());
        }

        var bigView = new BigViewModel
        {
            VersionsModel = _context.Versions.ToList(),
            EnvironmentViewModel = _context.Environments.ToList(),
        };

        return View(model: bigView);
}