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I am trying to filter a dictionary here in a .NET 3.5 class library project, using linq expressions. Problem I am having is I don't seem to have the right dlls referenced to carry this out, it seems.

When I try to put the following code in 

foreach (var item in TempFilesdictionary.Where(kvp => kvp.Value == false).ToList())
{
    dic.Remove(item.Key);
}

I get the error message . . .

System.Collections.Generic.IDictionary<String, bool> does not contain a definition for 'Where' and no extension method 'Where' accepting a first argument of type System.Collections.Generic.IDictionary<String, Bool> could be found

What libraries do I need to reference in my .NET 3.5 library to access the linq extension methods, apart from System.Core.dll, System.dll, System.Xml.Linq?

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1 回答 1

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You need to add a using directive for System.Linq.

于 2013-07-08T19:38:22.980 回答