Csharp/C Sharp/Class Interface/public

A public constructor initializes private instance variable balance through public property.

<source lang="csharp">

using System; public class Account {

  private decimal balance; 
  public Account( decimal initialBalance )
  {
     Balance = initialBalance; 
  } 
  public void Credit( decimal amount )
  {
     Balance = Balance + amount; 
  } 
  public decimal Balance
  {
     get
     {
        return balance;
     } 
     set
     {
        if ( value >= 0 )
           balance = value;
     }
  } 

} public class AccountTest {

  public static void Main( string[] args )
  {
     Account account1 = new Account( 5.00M ); 
     Account account2 = new Account( -7.53M ); 
     Console.WriteLine( "account1 balance: {0:C}",account1.Balance ); 
     Console.WriteLine( "account2 balance: {0:C}\n",account2.Balance );
     decimal depositAmount; 
     Console.Write( "Enter deposit amount for account1: " );
     depositAmount = Convert.ToDecimal( Console.ReadLine() );
     Console.WriteLine( "adding {0:C} to account1 balance\n",depositAmount );
     account1.Credit( depositAmount ); 
     Console.WriteLine( "account1 balance: {0:C}",account1.Balance );
     Console.WriteLine( "account2 balance: {0:C}\n",account2.Balance );
     Console.Write( "Enter deposit amount for account2: " );
     depositAmount = Convert.ToDecimal( Console.ReadLine() );
     Console.WriteLine( "adding {0:C} to account2 balance\n",depositAmount );
     account2.Credit( depositAmount ); 
     Console.WriteLine( "account1 balance: {0:C}", account1.Balance );
     Console.WriteLine( "account2 balance: {0:C}", account2.Balance );
  }

}

      </source>

Class declaration with a public method that has a parameter.

<source lang="csharp">

using System; public class MyClass {

  public void DisplayMessage( string courseName )
  {
     Console.WriteLine( "Welcome to the grade book for\n{0}!",courseName );
  }

} public class MyClassTest {

  public static void Main( string[] args )
  {
     MyClass myMyClass = new MyClass();
     Console.WriteLine( "Please enter the course name:" );
     string nameOfCourse = Console.ReadLine(); 
     Console.WriteLine(); 
     myMyClass.DisplayMessage( nameOfCourse );
  } 

}

      </source>

Class declaration with one public method.

<source lang="csharp">

using System; public class MyClass {

  public void DisplayMessage()
  {
     Console.WriteLine( "Welcome to the Grade Book!" );
  }

} public class MyClassTest {

  public static void Main( string[] args )
  {
     MyClass myMyClass = new MyClass();
     myMyClass.DisplayMessage();
  }

}

      </source>

MyClass class with a public constructor to initialize the course name.

<source lang="csharp">

using System; public class MyClass {

  private string courseName;
  public MyClass( string name )
  {
     CourseName = name; 
  }
  public string CourseName
  {
     get
     {
        return courseName;
     } 
     set
     {
        courseName = value;
     }
  }
  public void DisplayMessage()
  {
     Console.WriteLine( CourseName );
  } 

} public class MyClassTest {

  public static void Main( string[] args )
  {
     MyClass gradeBook1 = new MyClass("C#" );
     MyClass gradeBook2 = new MyClass("Data Structures" );
     Console.WriteLine( "gradeBook1 course name is: {0}",gradeBook1.CourseName );
     Console.WriteLine( "gradeBook2 course name is: {0}",gradeBook2.CourseName );
  }

}

      </source>

User-defined public method

<source lang="csharp">

using System; public class MaximumFinder {

  public void DetermineMaximum()
  {
     Console.WriteLine( "Enter three floating-point values,\n pressing "Enter" after each one: " );
     double number1 = Convert.ToDouble( Console.ReadLine() );
     double number2 = Convert.ToDouble( Console.ReadLine() );
     double number3 = Convert.ToDouble( Console.ReadLine() );
     double result = Maximum( number1, number2, number3 );
     Console.WriteLine( "Maximum is: " + result );
  }
  public double Maximum( double x, double y, double z )
  {
     double maximumValue = x; 
     if ( y > maximumValue )
        maximumValue = y;
     if ( z > maximumValue )
        maximumValue = z;
     return maximumValue;
  } 

} public class MaximumFinderTest {

  public static void Main( string[] args )
  {
     MaximumFinder maximumFinder = new MaximumFinder();
     maximumFinder.DetermineMaximum();
  }

}

      </source>