C # 6.0: the new dictionary Initializer

Initializing dictionary is not something new, you can simply initialize a dictionary by collection initializer, which is a feature from c#3.0. Collection initializer Add a parameter to do key, a parameter as the value of the corresponding key. C#6.0 adds a capability to use key/indexer in initialization to map value directly to key and value.

The following code shows how collection initializer initializes the dictionary.

dictionary<int,string> students =Newdictionary<int,string> {    {1,"Student 1" },    {2,"Student 2" },    {3,"Student 3" },    {4,"Student 4" }};

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This defines a Dictionary object named students, which has a list of students with a key of type int, as shown in:

In C # 6.0, with the new dictionary Initializer, the following code block will do the same:

dictionary<int,string> students =Newdictionary<int,string> {    [1] ="Student 1" ,    [2] ="Student 2",    [3] ="Student 3",    [4] ="Student 4",};

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The above code returns the same result, and the difference is their method of assignment. In c#6.0, it seems that we get them through indexer. And that makes the code more understandable.

Now, if you want to add a new element to collection, you can use the following method.

students[5"Student 5"; students[6"Student 6 ";

The code above adds two new elements to the dictionary.

C # 6.0: the new dictionary Initializer