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 private UserControl currentUserControl;  private void button1_Click(object sender, System.EventArgs e)  {    if (this.currentUserControl != null)    {      this.panel1.Controls.Remove(currentUserControl);      this.currentUserControl = null;    }    this.

protected override void AddValidationRules() { //Validation rules based on database schema. // string validate ValidationRules.AddRule(CommonRules.Str

1. create the form.2. create the Business-object Customer, implement the IDataErrorInfousing System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Compon

// custom ObjectPublic Class Customer{ // class to get set a string to format of (key=value;key=value;...;...;) private NVParser parser = new NVParser(); public Customer() { parser.

This normally used for a generated business object. (nettier)get the business object. create a new Property Display Name, which based on property FirstName and Surname:The first line is importan

Create custom summary in End User Designer (script) (windows form) /////////////////////////////////////////////// select a label (sho

//  create the DatabaseReportStorage class which used to override the save, save as function. using System;using System.Collections.Ge

<br />while( list.SelectedIndices.Count > 0 )<br />{<br />      list.Items.RemoveAt(list.SelectedIndices[0]);<br />}

<br /><br />// Get the selected item in the combobox KeyValuePair<string, string> selectedPair = (KeyValuePair<string, string>)cboData.S

1, set the binding source, select the datasource from system business objectthis.listBox1.DataSource = this.iLicenseKeyBindingSource;thi

Form.AutoSize is working on runtime, not working on design view,  other controls.AutoSize is working on the design view. Form.AutoSize

ValueChanged event of the numericUpDown control doesn't fire when a user types in a value (instead of clicking on the up/down buttons).  Tha

MessageBox.Show("Message here");DialogResult dr = MessageBox.Show(this, "Are you sure you want to delete room ?", "Delete Room",MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2);if (dr == DialogResult.Yes){}e

// class with calculate size and position of control.class UIElement { // those properties get the Control current size, font, position public Control Control { get; set; } publi