C# vs. VB .Net Comparison for the Hello World Program

Here is the code from a VB .Net program (auto-generated Form Designer Code is not shown):

Download the VB .Net code by clicking on the Zip file.

Public Class frmMain
Inherits System.Windows.Forms.Form

Private Sub btnCheck_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCheck.Click
    ' check the text property of txtName
    If txtName.Text = "Carman" Then
        MsgBox("You rock!", vbOKOnly, "Name Validation")
    Else
        MsgBox("Error", vbCritical, "Name Validation")
    End If

    ' check the value property of trkAge
    If trkAge.Value < 5 Then
        MsgBox("Youngin'", vbOKOnly, "Age Validation")
    ElseIf trkAge.Value >= 5 And trkAge.Value < 18 Then
        MsgBox("How's school going?", vbOKOnly, "Age Validation")
    Else
        MsgBox("Start planning your life...", vbOKOnly, "Age Validation")
    End If

    ' reset our controls' properties
    txtName.Text = ""
    txtAddress.Text = ""
    trkAge.Value = 0
End Sub

Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    ' this subroutine runs when your form first appears

    ' we will change some properties of our controls at startup

    ' to access a control's property, type the name of the control, then a period, and
    ' finally the property's name
    txtName.Text = ""
    txtAddress.Text = ""
    trkAge.Value = 15
End Sub

End Class
 

Here is the code from the C# program (auto-generated Form Designer Code is not shown):

Download the C# code by clicking on the Zip file.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace HelloWorld_CSharp
{
    /// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form   
    {
        private System.Windows.Forms.Label lblName;
        private System.Windows.Forms.Label lblAddress;
        private System.Windows.Forms.Label lblAge;
        private System.Windows.Forms.TextBox txtName;
        private System.Windows.Forms.TextBox txtAddress;
        private System.Windows.Forms.Button btnCheck;
        private System.Windows.Forms.TrackBar trkAge;


        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {   
            Application.Run(new Form1());
        }

        private void btnCheck_Click(object sender, System.EventArgs e)
        {
            // check the text property of txtName
            if (txtName.Text == "Carman")
            {
                MessageBox.Show("You rock!", "Name Validation", MessageBoxButtons.OK);
            }
            else
            {
                MessageBox.Show("Error", "Name Validation", MessageBoxButtons.OK);
            }

            // check the value property of trkAge
            if (trkAge.Value < 5)
            {
                MessageBox.Show("Youngin'", "Age Validation", MessageBoxButtons.OK);
            }
            else if (trkAge.Value >= 5 && trkAge.Value < 18)
            {
                MessageBox.Show("How's school going?", "Age Validation", MessageBoxButtons.OK);
            }
            else
            {
                MessageBox.Show("Start planning your life...", "Age Validation", MessageBoxButtons.OK);
            }

            // reset our controls' properties
            txtName.Text = "";
            txtAddress.Text = "";
            trkAge.Value = 0;
        }

        private void Form1_Load(object sender, System.EventArgs e)
        {
            // this subroutine runs when your form first appears

            // we will change some properties of our controls at startup

            // to access a control's property, type the name of the control, then a period, and
            // finally the property's name
            txtName.Text = "";
            txtAddress.Text = "";
            trkAge.Value = 15;
         }
    }
}