C#: sort dictionary in descending order

How do I sort a keyvalue pair with descending order of their values?

foreach (KeyValuePair<string, int> item in开发者_运维百科 keyvalue.OrderBy(key => key.Value))
            {
            } 

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Use OrderByDescending instead of OrderBy.

foreach (var item in keyvalue.OrderByDescending(key => key.Value))
{

}