Tridion extension methods for Tridion TOM.Net API. available as Nuget Package: https://www.nuget.org/packages/tridion-extensions-coreservice/ Source: https://bitbucket.org/sshibani/tridion.extensions

Tridion Extension CoreService

var client = Wrapper.GetCoreServiceWsHttpInstance(cmsurl, username, password, domain, CoreServiceInstance.Tridion2011);
Console.WriteLine(client.GetApiVersion());

// retrieve a component linked from a component
ComponentData comp = "tcm:5-18".ToTcmUri().GetItem<ComponentData>().GetFieldAsComponent("linkedComponent");

//retrieve a xml representation list of the items within the forlder and its childern
XElement el = "tcm:5-55-2".ToTcmUri().GetListXml(true);

// retrieve field as string from the content 
string value = "tcm:1003-2096".ToTcmUri().GetItem<ComponentData>().GetFieldAsString("Value", ContentType.Content);

// retrieve field as string from the meta content  
string value = "tcm:1003-2096".ToTcmUri().GetItem<ComponentData>().GetFieldAsString("Value", ContentType.Metadata);