THE WORLD'S LARGEST WEB DEVELOPER SITE

C# Method Overloading


Method Overloading

With method overloading, multiple methods can have the same name with different parameters:

Example

int MyMethod(int x)
float MyMethod(float x)
double MyMethod(double x, double y)

Consider the following example, which have two method that adds numbers of different types:

Example

static int PlusMethodInt(int x, int y)
{
  return x + y;
}

static double PlusMethodDouble(double x, double y)
{
  return x + y;
}

static void Main(string[] args)
{
  int myNum1 = PlusMethodInt(8, 5);
  double myNum2 = PlusMethodDouble(4.3, 6.26);
  Console.WriteLine("Int: " + myNum1);
  Console.WriteLine("Double: " + myNum2);
}

Run example »

Instead of defining two methods that should do the same thing, it is better to overload one.

In the example below, we overload the PlusMethod method to work for both int and double:

Example

static int PlusMethod(int x, int y)
{
  return x + y;
}

static double PlusMethod(double x, double y)
{
  return x + y;
}

static void Main(string[] args)
{
  int myNum1 = PlusMethod(8, 5);
  double myNum2 = PlusMethod(4.3, 6.26);
  Console.WriteLine("Int: " + myNum1);
  Console.WriteLine("Double: " + myNum2);
}

Run example »

Note: Multiple methods can have the same name as long as the number and/or type of parameters are different.