如何在C#中获取字典的键

Dictionary<string, string> myDictionary = new Dictionary<string, string>();
myDictionary.Add("key1", "value1");
myDictionary.Add("key2", "value2");
myDictionary.Add("key3", "value3");

foreach (string key in myDictionary.Keys)
{
    Console.WriteLine("Key: " + key);
}