1. Create a new console application in Visual Studio called Packt.Xrm.Batch.
2. Right-click on References and click on Manage NuGet Packages, and search and install Microsoft.CrmSdk.XrmTooling.CoreAssembly.
3. Include the following using statements in your .cs file:

using Microsoft.Xrm.Sdk; 
using Microsoft.Xrm.Sdk.Messages; 
using Microsoft.Xrm.Tooling.Connector; 

4. Copy and insert the following code in your main function (don't forget to update the connection string):

var connectionString = "AuthType=Office365;[email protected];Password=;Url=https://.crm6.dynamics.com"; 

var crmSvc = new CrmServiceClient(connectionString); 

using (var serviceProxy = crmSvc.OrganizationServiceProxy) 
{ 
    //Create request collection 
    var request = new OrganizationRequestCollection() 
    { 
            new CreateRequest 
            { 
                Target = new Entity("account") 
                { 
                    ["name"] = "Packt Account" 
                } 
            }, 
            new CreateRequest 
            { 
                Target = new Entity("contact") 
                { 
                    ["firstname"] = "Packt", 
                    ["lastname"] = "Contact" 
                } 
            } 
    }; 

  //Create Transaction and pass previously created request collection 
    var requestToCreateRecords = new ExecuteMultipleRequest() 
    { 
        // Create an empty organization request collection. 
        Requests = request, 
        Settings = new ExecuteMultipleSettings() 
        { 
            ContinueOnError = true, 
            ReturnResponses = true 
        } 
    }; 

    //Execute requests within the transaction 
    var responseForCreateRecords = (ExecuteMultipleResponse)serviceProxy.Execute(requestToCreateRecords); 

    // Display the results of each response. 
    foreach (var responseItem in responseForCreateRecords.Responses) 
    { 
        Console.WriteLine("Created record with GUID {0}", responseItem.Response.Results["id"].ToString()); 
    } 
}