How to print values from JSON Type Object to console in C#

I am trying to write a console application using c# 2.0 which will consume my webservice and return results from the webmethod.

In my C# code, I am able to get my values from the webmethod, please see below sample code:

 // print results
            try
            {

                Type objtype = Type.GetType(crisresult.ToString());
                object obj = Activator.CreateInstance(objtype);

                Object[] mArgs = new Object[methodArgs.Length + 1];
                methodArgs.CopyTo(mArgs, 0);
                mArgs.SetValue(obj, methodArgs.Length);
                methodArgs = mArgs;

                Object result = mi.Invoke(service, methodArgs);           
                Console.WriteLine(result);            

            }
            catch (Exception e)
            {
                Console.WriteLine("Error invoking method '" + methodName + "'");
                Console.WriteLine(e);
            }
            Console.WriteLine("Press enter to continue...");
            Console.ReadLine();

Now in above code my results from my webmethod is returned perfectly in JSON Type so my Object result have JSON type of values for example:

{"FullName":"Mr Mahesh Sharma","Miles":0,"TierStatus":"IO","TierMiles":0,"MilesExpiry":0,"ExpiryDate":"30/03/2012 00:00:00","AccessToken":"106C9FD143AFA6198A9EBDC8B9CC0FB2CE867356222D21D45B16BEEB9A7F390B5E226665851D6DB9","ActiveCardNo":"00300452124","PersonID":8654110}

Above result, I want to print in console with below format:

FullName: Mr Mahesh Sharma
Miles: 0
TierStatus: IO
TierMiles:0
MilesExpiry:0
ExpiryDate:31 March 2012
AccessToken: 106C9FD143AFA6198A9EBDC8B9CC0FB2CE867356222D21D45B16BEEB9A7F390B5E226665851D6DB9
ActiveCardNo: 00300452124
PersonID: 8654110