CheckBox and RichTextBox

namespacewindowsformsapplication1{ Public Partial classForm1:form { PublicForm1 () {InitializeComponent (); }        Private voidForm1_Load (Objectsender, EventArgs e) {            foreach(Control ctlinch  This. Controls)//traversing controls in a form            {                 if(CTL. GetType (). Name = ="CheckBox")//determines whether the type of control is a checkbox{checkbox cbox= (checkbox) CTL;//casting a traversed controlCbox. Autoellipsis =true;//set text too long display ...
 //cbox. CheckAlign = ContentAlignment.MiddleCenter; do not dare to write this option, otherwise run the result as
                 

Cbox. CheckAlign =Contentalignment.bottomright;Cbox. Checked=false; }            }        }        //Select basketball check box        Private voidCheckbox1_checkedchanged (Objectsender, EventArgs e) {            if(checkbox1.checked)//determine if CheckBox1 is selected            {                if(richTextBox1.Text = ="") richTextBox1.Text= Checkbox1.text;//assign a value to a text box                ElserichTextBox1.Text+=","+Checkbox1.text; }        }        //Select football check box        Private voidCheckbox2_checkedchanged (Objectsender, EventArgs e) {            if(checkbox2.checked)//determine if CheckBox2 is selected            {                if(richTextBox1.Text = ="") richTextBox1.Text= Checkbox2.text;//assign a value to a text box                ElserichTextBox1.Text+=","+Checkbox2.text; }         }        //Select the ping- pong ball check box        Private voidCheckbox3_checkedchanged (Objectsender, EventArgs e) {            if(checkbox3.checked)//determine if CheckBox3 is selected            {                if(richTextBox1.Text = ="") richTextBox1.Text= Checkbox3.text;//assign a value to a text box                ElserichTextBox1.Text+=","+Checkbox3.text; }        }    }}

CheckBox and RichTextBox