Get Parameter Names from non used DynamicParameters

I am trying to log the command and the parameter names and values.

example:

				DynamicParameters parameters = new DynamicParameters(new
				{
					 DistribCode = distributorCode,
					 YardCode = string.Empty,
					 IncludeInactive = includeInactive

				});
				const string sp = "[brcSP_GetInvnDistributorsAndProductionYards]";
				_brcConnection.WriteDapperSQLLog(sp, parameters);

//____________________ WriteDapperSQLLog below
				StringBuilder logBuilder = new StringBuilder();
				if (Transaction.Current != null)
				{
					 logBuilder.Append("IN TRANSACTION!!!");
				}

				logBuilder.Append($"exec {storedProc}{Environment.NewLine}");
				if (param != null)
				{
					 int index = 0;
					 if (typeof(DynamicParameters) == param.GetType())
					 {
						  DynamicParameters parameters = param as DynamicParameters;
						  foreach (string name in parameters.ParameterNames)
						  {
								dynamic value = parameters.Get<dynamic>(name);
								logBuilder.Append($" @{name} = {value?.ToString() ?? string.Empty}{((index++ == parameters.ParameterNames.Count() - 1) ? string.Empty : ",")}{Environment.NewLine}");
						  }
						  					 }
					 else

ParameterNames is 0 length.

Start by reproducing the shown DynamicParameters construction and inspect the ParameterNames entry point, including how values are retrieved with Get. Confirm why ParameterNames is empty for these parameters, then add coverage and ensure the parameter names and values can be logged as expected.