title: How can I prevent a RadioButton from being checked when the Form loads?
body: <p>I can't seem to prevent my form from checking one of the <strong>Radio Buttons</strong> in my <code>Group Box</code>:</p>
  
  <p><img src="https://i.stack.imgur.com/1kb7y.png" alt="enter image description here"></p>
  
  <p>As shown in the designer, no <strong>Radio Buttons</strong> are checked there.</p>
  
  <p>Below is just about all of the code for this simple form. Nothing calls for a <strong>Radio Buttons</strong> to be checked here or in the form's designer.</p>
  
  <p><strong>Q:</strong> Is there a way to prevent any <strong>Radio Button</strong> from being checked when the form loads?</p>
  
  <pre><code>public ValueTypeSelector() {
    InitializeComponent();
    radioButton1.Checked = false;
    radioButton2.Checked = false;
    radioButton3.Checked = false;
    radioButton4.Checked = false;
    radioButton5.Checked = false;
    radioButton6.Checked = false;
    button1.Enabled = false;
    button1.Click += clickEvent;
    button2.Click += clickEvent;
    radioButton1.Click += clickEvent;
    radioButton2.Click += clickEvent;
    radioButton3.Click += clickEvent;
    radioButton4.Click += clickEvent;
    radioButton5.Click += clickEvent;
    radioButton6.Click += clickEvent;
  }
  
  void OnShow(object sender, EventArgs e) {
    foreach (RadioButton rad in Controls) {
      if (rad.Checked) {
        Console.WriteLine("WTF?");
      }
    }
  }
  
  void clickEvent(object sender, EventArgs e) {
    RadioButton rad = sender as RadioButton;
    if (rad != null) {
      if (rad.Checked) {
        if (rad == radioButton1) {
          DataType = TableDataType.Boolean; // &lt;= HERE IS THE PROBLEM! FIRES ON FORM LOAD
        } else if (rad == radioButton2) {
          DataType = TableDataType.Character;
        } else if (rad == radioButton3) {
          DataType = TableDataType.DateTime;
        } else if (rad == radioButton4) {
          DataType = TableDataType.Decimal;
        } else if (rad == radioButton5) {
          DataType = TableDataType.Integer;
        } else if (rad == radioButton6) {
          DataType = TableDataType.String;
        } else {
          return;
        }
        button1.Enabled = true;
      }
    } else if (sender == button1) {
      DialogResult = DialogResult.OK;
      Close();
    } else if (sender == button2) {
      DialogResult = DialogResult.Cancel;
      Close();
    }
  }
  </code></pre>
  
  <p><strong>UPDATE:</strong> The problem is that <code>radioButton1</code> gets checked when the form is shown:</p>
  
  <pre><code>      if (rad == radioButton1) {
          DataType = TableDataType.Boolean; // &lt;= HERE IS THE PROBLEM! FIRES ON FORM LOAD
        } else if (rad == radioButton2) {
  </code></pre>