What is a dictionary object in C#?
In C#, Dictionary is a generic collection that is generally used to store key/value pairs. The operation of Dictionary is quite similar to the non-generic hash table. The advantage of Dictionary is that it is a generic type. The dictionary is defined in System. Generic namespace.
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Is C#’s dictionary thread-safe?
A dictionary can support multiple readers at the same time, as long as the collection is not modified. Even so, enumeration through a collection is not inherently thread-safe. For modifications and write operations to the dictionary, ConcurrentDictionary uses fine-grained locking to ensure thread safety.
What is the difference between KeyValuePair and C# Dictionary?
KeyValuePair is the unit of data stored in a Hashtable (or Dictionary). They are not equivalent to each other. A key-value pair contains a single key and a single value. A dictionary or hash table contains a mapping of many keys to their associated values.
What does immutable mean in C#?
An immutable object is defined as an object that cannot be changed after it has been created.
Is the hash table just a dictionary?
Hashtable and Dictionary are a collection of data structures to hold data as key-value pairs. Dictionary is of generic type, hash table is not of generic type. Hashtable is a weakly typed data structure, so you can add keys and values of any type of object to the Hashtable.
How to create dictionary for object in C#?
Dictionary to Object in C# Create an object from a collection of dictionaries Dictionaries are very useful as data containers for any type of C# code. You can easily manipulate data stored in collections, but there are disadvantages like posting data to REST JSON service.
How is KeyValuePair used in c# dictionary?
The English dictionary is a collection of words and their definitions, often arranged alphabetically in one or more specific languages. Similarly, Dictionary in C# is a collection of Keys and Values, where key is like word and value is like definition.
Why doesn’t dictionary with object as value compile?
This doesn’t compile, because the values in your dictionary are of type object and the object doesn’t contain a property name. If you are using .NET 4, you can change the object type to dynamic. Having said this, I strongly disagree with this design decision. You really should create a class for this.
How are dictionaries used as data containers in C#?
Dictionaries are very useful as data containers for any type of C# code. You can easily manipulate data stored in collections, but there are disadvantages like posting data to REST JSON service. The easiest way to invoke the JSON REST API is to simply serialize your object to a JSON string.