How to set a Checkbox checked property to true

Question

I want to set the default property of a checkbox to true

Answer 1

I suppose you only mean that on opening a form, one or more check boxes are checked .

Simply write in the Form_Load method

private void Form_Loaded (object sender, RoutedEventArgs e) {
    CheckBox1.IsChecked = true;
}

Answer 2

chkEntregue.CheckState = CheckState.Checked;

Answer 3

Set the Checked property to True in the Properties window of Visual Studio at design time.

Answer 4

To set CheckBox:

 CheckBoxName.SetCurrentValue(CheckBox.IsCheckedProperty, true);

To unset CheckBox:

 CheckBoxName.SetCurrentValue(CheckBox.IsCheckedProperty, false);