void Start()
{
if (openWith.Count == 0)
{
// Add some elements to the dictionary. There are no
// duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe");
openWith.Add("bmp", "paint.exe");
openWith.Add("dib", "paint.exe");
openWith.Add("rtf", "wordpad.exe");
}
// The Add method throws an exception if the new key is
// already in the dictionary.
try
{
openWith.Add("txt", "winword.exe");
}
catch (ArgumentException)
{
Debug.Log("An element with Key = \"txt\" already exists.");
}
// The indexer can be used to change the value associated
// with a key.
openWith["rtf"] = "winword.exe";
Debug.Log("For key = \"rtf\", value = " + openWith["rtf"]);
// If a key does not exist, setting the indexer for that key
// adds a new key/value pair.
openWith["doc"] = "winword.exe";
// The indexer throws an exception if the requested key is
// not in the dictionary.
try
{
Debug.Log("For key = \"tif\", value = " + openWith["tif"]);
}
catch (KeyNotFoundException)
{
Debug.Log("Key = \"tif\" is not found.");
}
// When a program often has to try keys that turn out not to
// be in the dictionary, TryGetValue can be a more efficient
// way to retrieve values.
string value = "";
if (openWith.TryGetValue("tif", out value))
{
Debug.Log("For key = \"tif\", value = " + value);
}
else
{
Debug.Log("Key = \"tif\" is not found.");
}
// ContainsKey can be used to test keys before inserting
// them.
if (!openWith.ContainsKey("ht"))
{
openWith.Add("ht", "hypertrm.exe");
Debug.Log("Value added for key = \"ht\": " + openWith["ht"]);
}
// When you use foreach to enumerate dictionary elements,
// the elements are retrieved as KeyValuePair objects.
Console.WriteLine();
foreach (KeyValuePair <string, string> kvp in openWith)
{
Debug.Log("Key = " + kvp.Key + " , Value = " + kvp.Value);
}
// To get the values alone, use the Values property.
Dictionary <string, string> .ValueCollection valueColl = openWith.Values;
// The elements of the ValueCollection are strongly typed
// with the type that was specified for dictionary values.
foreach (string s in valueColl)
{
Debug.Log("Value = " + s);
}
// To get the keys alone, use the Keys property.
Dictionary <string, string> .KeyCollection keyColl = openWith.Keys;
// The elements of the KeyCollection are strongly typed
// with the type that was specified for dictionary keys.
foreach (string s in keyColl)
{
Debug.Log("Key = " + s);
}
// Use the Remove method to remove a key/value pair.
Debug.Log("\nRemove(\"doc\")");
openWith.Remove("doc");
if (!openWith.ContainsKey("doc"))
{
Debug.Log("Key \"doc\" is not found.");
}
}