.NET 4.0 Cannot resolve reference to System.Web.Extensions assembly
问题 I'm trying to import System.Web.Script.Serialization so I can deserialize JSON, but in my Imports statement, Visual Studio can't find the System.Web.Extensions assembly. Before you dismiss this, I have already made sure I am not using .NET 4.0 Client, and have tried to reference the assembly through the Reference Manager, through the Properties window, and by dragging and dropping the file directly to the Bin folder, then attempting to reference it. I still get the following error. I have