The referenced component "System.Core" was not found?

The library System.Core is not referenced in your project, you might try one of the attempts below, all are in the project properties page (how do I go there?)

Let'schangetheFrameworkTargetofyourproject,gototheApplicationtabandchangewhatisinTargetFrameworktothelargest

Method2

ManuallyreferencetheSystem.Corelibraryinyourproject.GototheReferencestabandclicktheAddbutton.

SelectontheAssemblies>FrameworkandSystem.CoreoptionsandthenclickOK.

RemovetheassemblySystem.Coreandtryrunningyourprojectwithoutit.

Unfortunately there is no solution, the System.Core namespace is only available from the 3.5 version of the framework, or you upgrade to version 3.5 or you will have to provide other means to do what you intended.