private void ApplyDarkTheme()
{
this.BackColor = DarkTheme.BackgroundColour();
DarkTheme.Labels(lblAsymmetricKey);
DarkTheme.Labels(lblPassword);
DarkTheme.LinkLabels(llbGenerateKeyPair);
DarkTheme.TextBoxes(txtKey);
DarkTheme.TextBoxes(txtPassword);
DarkTheme.Buttons(btnEncryptPassword);
DarkTheme.Buttons(btnDecryptPassword);
DarkTheme.ContextMenu(cmsTextboxMenu);
}