PredicateBuilder造成麻烦

Dictionary<string, List<VerifiedUrl>>

var invertedIndex = new Dictionary<string, List<VerifiedUrl>>();

//the invertedIndex is built and filled here. Now I am trying to search through it.

Console.WriteLine(\"\\nEnter words to see if there are matches\");
string query = Console.ReadLine();
Console.WriteLine();

string[] words = query.Split(\',\', \' \'); 

//the predicate I\'ll be building. I\'m not positive it is of the correct type. I\'ve assumed that it should be of the same type as the Dictionary type in the inverted index
var predicate = PredicateBuilder.False<KeyValuePair<string, List<VerifiedUrl>>>();

foreach (string w in words)
{
    string temp = w;
    predicate = predicate.Or(p => p.Key == temp);
}
//this is the line that generates the syntax error.
test = invertedIndex.Where(predicate);

var predicate = PredicateBuilder.False<KeyValuePair<string, List<VerifiedUrl>>>();

Expression<Func<KeyValuePair<string, List<VerifiedUrl>>, bool>> predicate = PredicateBuilder.False<KeyValuePair<string, List<VerifiedUrl>>>();

Error   1   Instance argument: cannot convert from \'System.Collections.Generic.Dictionary<string,System.Collections.Generic.List<InvertedIndexConsoleApp.VerifiedUrl>>\' to \'System.Linq.IQueryable<System.Collections.Generic.KeyValuePair<string,System.Collections.Generic.List<InvertedIndexConsoleApp.VerifiedUrl>>>\'   c:\\users\\josh\\documents\\visual studio 2010\\Projects\\InvertedIndexConsoleApp\\InvertedIndexConsoleApp\\Program.cs  79  25  InvertedIndexConsoleApp

Error   2   \'System.Collections.Generic.Dictionary<string,System.Collections.Generic.List<InvertedIndexConsoleApp.VerifiedUrl>>\' does not contain a definition for \'Where\' and the best extension method overload \'System.Linq.Queryable.Where<TSource>(System.Linq.IQueryable<TSource>, System.Linq.Expressions.Expression<System.Func<TSource,bool>>)\' has some invalid arguments c:\\users\\josh\\documents\\visual studio 2010\\Projects\\InvertedIndexConsoleApp\\InvertedIndexConsoleApp\\Program.cs  79  25  InvertedIndexConsoleApp