在C#中使用Linq实现基于字典对象的数据查询

Dictionary<string, int> dictionary = new Dictionary<string, int>();
dictionary.Add("Apple", 10);
dictionary.Add("Banana", 5);
dictionary.Add("Orange", 8);

var query = from kvp in dictionary
            select kvp;

var query = from kvp in dictionary
            where kvp.Key == "Apple"
            select kvp.Value;

var query = from kvp in dictionary
            where kvp.Value > 5
            select kvp;

var query = from kvp in dictionary
            where kvp.Key.StartsWith("A") || kvp.Value > 5
            select kvp;

foreach (var kvp in query)
{
    Console.WriteLine("Key: " + kvp.Key + ", Value: " + kvp.Value);
}