How to define custom methods in C#?

To define a custom method in C#, use the following syntax −

<Access Specifier> <Return Type> <Method Name>(Parameter List) { Method Body }

The following are the various elements of a method −

• Access Specifier − This determines the visibility of a variable or a method from another class.

• Return type − A method may return a value. The return type is the data type of the value the method returns. If the method is not returning any values, then the return type is void.

• Method name − Method name is a unique identifier and it is case sensitive. It cannot be same as any other identifier declared in the class.

• Parameter list − Enclosed between parentheses, the parameters are used to pass and receive data from a method. The parameter list refers to the type, order, and number of the parameters of a method. Parameters are optional; that is, a method may contain no parameters.

• Method body − This contains the set of instructions needed to complete the required activity.

Let us see an example −

Example

 Live Demo

using System; namespace Demo {    class NumberManipulator {       public int FindMax(int num1, int num2) {          /* local variable declaration */          int result;          if (num1 > num2)          result = num1;          else          result = num2;          return result;       }       static void Main(string[] args) {          /* local variable definition */          int a = 90;          int b = 15;          int ret;          NumberManipulator n = new NumberManipulator();          //calling the FindMax method          ret = n.FindMax(a, b);          Console.WriteLine("Max value is : {0}", ret );          Console.ReadLine();       }    } }

Output

Max value is : 90