blah.cs

        private static IEnumerable<AuditParameter> GetParametersFromEnumeration(IEnumerable args)
        {
            var parameters = new List<AuditParameter>();
            foreach(var arg in args)
            {
                var iaudit = arg as IAuditableParameter;
                if(iaudit != null)
                {
                    parameters.Add(new AuditParameter {Value = iaudit.AuditParameter});
                    continue;
                }

                if (arg.GetType() != typeof(string))
                {
                    var enumeration = arg as IEnumerable;
                    if (enumeration != null)
                    {
                        parameters.AddRange(GetParametersFromEnumeration(enumeration));
                        continue;
                    }
                }
                parameters.Add(new AuditParameter {Value = arg.ToString()});

            }
            return parameters;
        }

tests.cs

[Test]
public void Can_I_Handle_Enumerations()
{
    var method = GetType().GetMethod("DummyEnumeration");
    var details = new MethodDetails(method, new object[]{ new[] { "scott", "was", "here" }});
    var entry = AuditEntry.FromMethodExecutionArgs(3, details); 
    Assert.IsTrue(entry.Parameters.Count == 3);
    Assert.IsTrue(entry.Parameters[0].Value == "scott");
    Assert.IsTrue(entry.Parameters[1].Value == "was");
    Assert.IsTrue(entry.Parameters[2].Value == "here");
}

[Test]
public void Can_I_Handle_Deep_Nesting()
{
    var method = GetType().GetMethod("DummyEnumeration");
    var objects = new object[4];
    objects[0] = new[] {"scott", "was", "here"};
    objects[1] = new[] {"another", "string"};
    objects[2] = true;
    objects[3] = new[] {1, 2, 3, 4}; //for now, we are going to skip arrays of value types


    var details = new MethodDetails(method,objects);
    var entry = AuditEntry.FromMethodExecutionArgs(3, details);
    Assert.IsTrue(entry.Parameters.Count == 7, "Expected 7 parameters, but found {0}", entry.Parameters.Count);
            
}