Nullable Types

Teacher
Farhan Sakib
Category
Csharp(C#)
Tag
Csharp(C#)
Playlist

Topic Name Introduction to C# Environment Setup C# Keywords Contextual Keywords C# Namespaces What Is Class? What is Object? Data Types Nullable Types C# Variables What are Access Modifiers? What is Property? What is Indexer? Hello world Program What is Type conversion? What is if else condition? What is Array? What is Jagged Array? What is ArrayList? What is List? What is string and StringBuilder? What is for loop? What is foreach loop? What is switch? What is Method? What is method overloading? What is Constructor? What is constructor overloading? What is Boxing and Unboxing? What is delegate in C# and uses of delegates? What is Inheritance? What are Value types and Reference types? What is Exception Handling? What is struct? What is Dictionary? What is Hashtable? What is interface? What is Abstraction? What is Polymorphism? What is Enums? What is Sealed Class? What is Partial Class? Extension Methods? What is static? What is Encapsulation? Difference between Equality Operator (==) and Equals() Method in C# ? What is IEnumerable? What is Serializing? What is LINQ? Differences between IEnumerable and IQueryable? What is Multithreading? What is File Handling? What is late binding and early binding? What is Singleton Design Patterns?

1/7/2020 5:44:53 AM

Nullable Types

Esteem sorts can't be doled out as invalid, reference sorts can. Applications that work with databases manage the invalid esteem. Along these lines, uncommon nullable sorts were brought into the C# dialect. Nullable sorts are occurrences of the System.Nullable<T> struct.

Ex:

using System;  
	  
class Employee  
{  
static void Main()  
 {  
  Nullable<bool> Name= null;  
  int? Age = null;  
 Console.WriteLine(Name.HasValue);  
 Console.WriteLine(Age.HasValue);  
 }  
}

A straightforward illustration showing nullable sorts.
Nullable<bool> male = invalid;
int? age = invalid;
There are two courses to proclaim a nullable sort. Either with the Nullable<T> bland structure in which the sort is determined between the edge sections, or we can utilize a question mark after the sort.