Generating EarlyBound CRM Entities using crmsvcutil.exe

To generate XRM.cs navigate to the sdk bin folder from the command prompt and use the below command
NOTE: This command works for crm 2011 online environment

CrmSvcUtil.exe /codeCustomization:"Microsoft.Xrm.Client.CodeGeneration.CodeCustomization, Microsoft.Xrm.Client.CodeGeneration"   /url:https://crmtest.api.crm.dynamics.com/XRMServices/2011/Organization.svc   /out:Xrm.cs   /username:liveid   /password:password   /deviceid: deviceid /devicepassword: devicepassword   /namespace:Xrm   /servicecontextname:XrmServiceContext  /servicecontextprefix:Xrm


References:
http://msdn.microsoft.com/en-us/library/gg695782.aspx