how to default select checkbox

LSCGIS

I Add a ChekBox using ArcGIS Pro SDK For .NET，how to make it default select。The code below dosn't work. Thanks!

internal class CheckBoxSimplify : ArcGIS.Desktop.Framework.Contracts.CheckBox
{
public CheckBoxSimplify()
{
IsChecked = true;//do not work
}

protected override void OnClick()
{
ModuleSAM.Current.IsSimplify = IsChecked.Value;
base.OnClick();
}
}

Wolf

Understood, in my example i set the attribute

isChecked="true"

in my config.daml definition of the checkBox to true.   That initializes my checkBox on the screen to 'Checked' when i start Pro.   But you are correct the code-behind doesn't get called until JIT (Just In Time) triggers loading and the execution of the code.   So @LSCGIS  would have to set isChecked to true in the DAML and also initialize  ModuleSAM.Current.IsSimplify  to 'true' to keep the checkbox and the property in sync.  If this the case then the loadOnClick  value is irrelevant.