C# List与Dictionary相互转换与高效查找

testmodel类定义：

public class testmodel
{
    public int id { get; set; }
    public string name { get; set; }
    public string code { get; set; }

}

 

dictionary与list定义：

list<testmodel> list = new list<testmodel>();
dictionary<int, testmodel> dict = new dictionary<int, testmodel>();

 

dictionary转list：

dict = list.tolookup(model => model.id).todictionary(model => model.key, model => model.first());

 

list转dictionary：

list = dict.values.tolist();

 

高效查找：

foreach (testmodel item in list)
{
    if (dict.containskey(item.id))
    {
        testmodel model = dict[item.id];
    }
}