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C# Program to Get the Count of Total Created Objects

  • Last Updated : 30 Sep, 2021

C# is a general-purpose programming language it is used to create mobile apps, desktop apps, websites, and games. In C#, an object is a real-world entity.  Or in other words, an object is a runtime entity that is created at runtime. It is an instance of a class. In this article, we will create multiple instances or objects of a class and count the number of objects created in C#.

Approach:

  • Create a class with the name DemoClass for which we are creating multiple objects.
  • We create a class ( .i.e. GetCount) with the main method from which we will create multiple objects of the DemoClass.
  • In the Democlass, we are going to define a static variable count and initialize it to 0.
  • Create a constructor for DemoClass which increments the count whenever the object of DemoClass is created.
  • Here we are defining it as static because a single copy of the variable is created and shared among all objects at the class level, so whenever we create a new object the value of count will not be lost.
  • A static method (i.e. TotalCount ) is created to return the count value, Static methods are methods that are called on the class itself, not on an object.
  • In the main method create multiple objects of DemoClass and call the TotalCount method using the class name (i.e. DemoClass).

Example 1:

C#




// C# program to illustrate the above concept
using System;
  
class DemoClass{
      
// The static variable count is used to store
// the count of objects created.
static int count = 0;
  
// Constructor of the class, in which count
// value will be incremented
public DemoClass() 
    count++; 
}
  
// Method totalcount is used to return 
// the count variable.
public static int TotalCount() 
{  
    return count; 
}
}
  
class GFG{
      
static void Main(string[] args)
{
      
    // Printing the number of objects before 
    // creating objects.
    Console.WriteLine("Total objects = "
                      DemoClass.TotalCount());
  
    // Creating the objects of DemoClass
    DemoClass C1 = new DemoClass();
    DemoClass C2 = new DemoClass();
    DemoClass C3 = new DemoClass();
  
    // Printing the number of objects after 
    // creating 3 objects.
    Console.WriteLine("Total objects = "
                      DemoClass.TotalCount());
}
}

Output:

Total objects = 0
Total objects = 3

Example 2:

C#




// C# program to illustrate the above concept
using System;
  
class DemoClass{
  
// Here, the static variable count is used to 
// store the count of objects created.
static int count = 0;
  
// constructor of the class, in which 
// count value will be incremented
public DemoClass() 
    count++; 
}
  
// Method totalcount is used to return
// the count variable.
public static int TotalCount() 
    return count; 
}
}
  
class GFG{
      
static void Main(string[] args)
{
      
    // Printing the number of objects before
    // creating objects.
    Console.WriteLine("Total objects = "
                      DemoClass.TotalCount());
  
    // Creating the objects of DemoClass
    DemoClass C1 = new DemoClass();
    DemoClass C2 = new DemoClass();
    DemoClass C3 = new DemoClass();
    DemoClass C4 = new DemoClass();
    DemoClass C5 = new DemoClass();
    DemoClass C6 = new DemoClass();
  
    // Printing the number of objects after 
    // creating 3 objects.
    Console.WriteLine("Total objects = "
                      DemoClass.TotalCount());
}
}

Output:

Total objects = 0
Total objects = 6



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