如何在C#中将字典初始化为(键,值,值)对

Dictionary<string, int> dictionary = new Dictionary<string, int>();
dictionary.Add("key1", 1);
dictionary.Add("key2", 2);
dictionary.Add("key3", 3);

Dictionary<string, int> dictionary = new Dictionary<string, int>();
dictionary["key1"] = 1;
dictionary["key2"] = 2;
dictionary["key3"] = 3;

Dictionary<string, int> dictionary = new Dictionary<string, int>
{
    { "key1", 1 },
    { "key2", 2 },
    { "key3", 3 }
};

using System.Linq;

var keyValuePairs = new[]
{
    new { Key = "key1", Value = 1 },
    new { Key = "key2", Value = 2 },
    new { Key = "key3", Value = 3 }
};

Dictionary<string, int> dictionary = keyValuePairs.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);