Static constructors are used to initialize Static fields of a class. Static constructor is called only once. It is called prior to initializing any object, any static members are referenced.
using System;
class Circle
{
static float PI;
int radius;
static Circle()
{
Console.WriteLine("Static constructor is called");
PI = 3.14f;
}
public Circle(int radius)
{
Console.WriteLine("Instance constructor is called with Radius {0}", radius);
this.radius = radius;
}
public float getArea()
{
return PI * radius * radius;
}
}
class Program
{
static void Main(string[] args)
{
Circle circle1 = new Circle(5);
Circle circle2 = new Circle(6);
float area1 = circle1.getArea();
float area2 = circle2.getArea();
Console.WriteLine("area1 : {0}", area1);
Console.WriteLine("area2 : {0}", area2);
}
}
Output
Static constructor is called
Instance constructor is called with radius 5
Instance constructor is called with radius 6
area1 : 78.5
area2 : 113.04
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