évolution du cadre cible

Question

Dans Visual Studio 2010 Express [VB.NET], si je change le cadre cible via les propriétés d'application> Compiler> options de compilation avancées à framework 2.0 de 4.0, je reçois une liste d'erreurs:

Warning 5 The referenced component 'System.Xml.Linq' could not be found. 
Warning 6 The referenced component 'System.Data.DataSetExtensions' could not be found.  
Warning 4 The referenced component 'System.Core' could not be found. 
Warning 2 The primary reference "System.Xml.Linq", which is a framework assembly, could not be resolved in the currently targeted framework. ".NETFramework,Version=v2.0". To resolve this problem, either remove the reference "System.Xml.Linq" or retarget your application to a framework version which contains "System.Xml.Linq". WindowsApplication3 
Warning 3 The primary reference "System.Data.DataSetExtensions", which is a framework assembly, could not be resolved in the currently targeted framework. ".NETFramework,Version=v2.0". To resolve this problem, either remove the reference "System.Data.DataSetExtensions" or retarget your application to a framework version which contains "System.Data.DataSetExtensions". WindowsApplication3 
Warning 1 The primary reference "System.Core", which is a framework assembly, could not be resolved in the currently targeted framework. ".NETFramework,Version=v2.0". To resolve this problem, either remove the reference "System.Core" or retarget your application to a framework version which contains "System.Core". WindowsApplication3 
Warning 7 Namespace or type specified in the project-level Imports 'System.Xml.Linq' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. WindowsApplication3 
Warning 8 Namespace or type specified in the project-level Imports 'System.Linq' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. WindowsApplication3 

J'ai cherché autour, mais, je n'arrive pas à trouver une réponse que je pense serait utile pour moi. J'utilise juste un projet vide avec rien dessus.

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Warning 1 Namespace or type specified in the project-level Imports 'System.Xml.Linq' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. WindowsApplication3 
Warning 2 Namespace or type specified in the project-level Imports 'System.Linq' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. WindowsApplication3 

Answer 1

Essayez de supprimer les références dans votre projet (s) à:

System.Xml.Linq 
System.Data.DataSetExtensions 
System.Core 

Ils sont automatiquement ajoutés par VS2010 Express.

Vous pouvez le faire en développant l'arborescence des références, en mettant en surbrillance la référence et en appuyant sur la suppression.