我有asp.net项目(在.net 2.0中),我将项目转换为.net 4.0.
在我成功构建项目之后,我在浏览器上启动了网站,它会抛出以下错误：
在我成功构建项目之后,我在浏览器上启动了网站,它会抛出以下错误：
Compilation Error
Description: An error occurred during the compilation of a resource
required to service this request. Please review the following specific
error details and modify your source code appropriately.Compiler Error Message: BC30560: ‘ExtensionAttribute’ is ambiguous in
the namespace ‘System.Runtime.CompilerServices’.Source Error:
[No relevant source lines]
Source File: InternalXmlHelper.vb Line: 9
……..
请给我一些想法来解决它.
