Calculate leap Year _winform

Create a new Form application (below) and create a new control Label1,label2,label3,textbox1,button1,button2

Change the Text property of Label1 to "Calculate Leap year Demo"

Change the Text property of Label2 to "enter year"

Change the Text property of button1 to "OK"

Change the Text property of button1 to "exit"

Full code:

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.ComponentModel;4 usingSystem.Data;5 usingSystem.Drawing;6 usingSystem.Linq;7 usingSystem.Text;8 usingSystem.Threading.Tasks;9 usingSystem.Windows.Forms;Ten  One namespaceCalculate leap Year _ form A { -      Public Partial classForm1:form -     { the         //leap Year: Years that can be divisible by 4, but not divisible by 100 or divisible by 400 -          PublicForm1 () -         { - InitializeComponent (); +         } -  +         Private voidButton2_Click (Objectsender, EventArgs e)//Exit button Code A         { at application.exit (); -         } -  -         Private voidButton1_Click (Objectsender, EventArgs e)//Determine the button code -         { -             Try in             { -                 intYear =Convert.ToInt32 (TextBox1.Text); to                 if(Year% -==0|| Year%4==0&& Year% -!=0)//leap Year: Years that can be divisible by 4, but not divisible by 100 or divisible by 400 +                 { -Label3. Text =string. Format ("{0} is a leap year", year);//output shows leap year the                 } *                 Else $                 {Panax NotoginsengLabel3. Text =string. Format ("{0} is not a leap year", year);//output shows non-leap years -                 } the             } +             Catch A             { theMessageBox.Show ("Please enter the correct year"); +             } -         } $     } $}

Calculate leap Year _winform