问如何检查选项卡控件中的另一个选项卡中是否已选中复选框

EN

<CheckBox Name="myCheckBox" />

if (myCheckBox.IsChecked) {
    Console.WriteLine("my checkbox is checked.");
}

public bool MyTextBoxIsChecked {get; set;}

<Checkbox Name="myCheckBox" />

private void myCheckBox_CheckedChanged(object sender, EventArgs e)
{
    if (myCheckBox.Checked)
    {
        Console.WriteLine("my checkbox is checked.");
    }
    else if (!myCheckBox.Checked)
    {
        Console.WriteLine("my checkbox is not checked."); 
    }
}

if (textbox1.Text.Length > 0)
{
  Console.WriteLine("Textbox has text"); 
}