C# code to get list of all objects from SFDC instance.

Get-All-SFDCObjects.cs

using log4net;
using log4net.Config;
using SFDCtoCRM_Migration.WebReference;
using System;
using System.Configuration;
// Code assumes that you have imported SFDC Enterprise WSDL into your solution
namespace SFDCtoCRM_Migration
{
    class Migrate
    {
        private static readonly ILog logger = LogManager.GetLogger(typeof(Migrate));
        static void Main(string[] args)
        {
            DOMConfigurator.Configure();

            string userName = ConfigurationManager.AppSettings.Get("sfdc.username");
            string password = ConfigurationManager.AppSettings.Get("sfdc.password");
            logger.Info("SFDC Username " + userName);
            WebReference.SforceService SfdcBinding = null;
            WebReference.LoginResult CurrentLoginResult = null;
            SfdcBinding = new SforceService();
            try
            {
                CurrentLoginResult = SfdcBinding.login(userName, password);
                //Change the binding to the new endpoint
                SfdcBinding.Url = CurrentLoginResult.serverUrl;

                //Create a new session header object and set the session id to that returned by the login
                SfdcBinding.SessionHeaderValue = new SessionHeader();
                SfdcBinding.SessionHeaderValue.sessionId = CurrentLoginResult.sessionId;
                DescribeGlobalResult globalResult = SfdcBinding.describeGlobal();
                int length = globalResult.sobjects.Length;
                logger.Debug("Count of Sobjects ::: " + length);
                for (int i = 0; i < length; ++i)
                {
                    String sobjname = globalResult.sobjects[i].name;
                    logger.Debug("Sobject is ::: " + sobjname);
                    int fieldLen = SfdcBinding.describeSObject(sobjname).fields.Length;
                    DescribeSObjectResult sobjectResult = SfdcBinding.describeSObject(sobjname);
                    String query = "";
                    for (int j = 0; j < fieldLen; ++j)
                    {
                        logger.Debug(" Field is " + sobjectResult.fields[j].name + " - " + sobjectResult.fields[j].type);
                        query = query + sobjectResult.fields[j].name;
                        if (j != fieldLen - 1)
                        {
                            query = query + " , ";
                        }
                    }
                    logger.Debug("select " + query + " from " + sobjname);
                }

            }
            catch (Exception e)
            {
                // 
                SfdcBinding = null;
                logger.Error(e);
            }
            finally
            {
                if (SfdcBinding != null)
                {
                    SfdcBinding.logout();
                    SfdcBinding.Dispose();
                    SfdcBinding = null;
                }
            }
            logger.Debug("Current OrgID is :: " + CurrentLoginResult.userInfo.organizationId);
            // This will just block things
            logger.Info("Execution completed, hit any key to close this window ..");
            Console.Read();
        }
    }
}