Wpf mvvmlight: relaycommand. Why won't my button enable?

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C#

WPF

MVVM

Hello!

I have a button which delete rows off of my DataGrid, whenever I have a row selected.
I use a RelayCommand to accomplish that.
But my button refuses to enable like I want it to!

slette — ImgBB[^]

I believe I've understood it to be an issue with the CanExecute functionality of RelayCommand.

How can I modify it to enable it upon row selection?

What I have tried:

private bool RemoveLicenseHolderCanExecute(LicenseHolder myLicenseHolder) {

    return LicenseHolders.Contains(myLicenseHolder);
}

In the code-behind, I've set IsEnabled = true; under the SelectionChanged-event.
And in the XAML, I've set the button property like so: IsEnabled="False"

If I remove the command bindings from the button, the button enables upon row-selection as expected.

The entirety of my RelayCommand is as follows (it's in my ViewModel):

private static bool RemoveFromDB(LicenseHolder myLicenseHolder) {

    string sqlString = $"Delete from tblLicenseHolder where ID = '{myLicenseHolder.ID}'";

    if (MessageBox.Show("Er du sikker på at du ønsker å slette valgt løyvehaver?", "Slett løyvehaver", MessageBoxButton.YesNo, MessageBoxImage.Warning) == MessageBoxResult.Yes) {

        try {

            using (SqlConnection sqlCon = new(ConnectionString.connectionString))
            using (SqlCommand sqlCmd = new(sqlString, sqlCon)) {

                sqlCon.Open();
                sqlCmd.ExecuteNonQuery();
                return true;
            }

        }
        catch {

            return false;
        }

    } else {

        return false;
    }
}

private void RemoveLicenseHolderExecute(LicenseHolder myLicenseHolder) {

    bool result = RemoveFromDB(myLicenseHolder);
    if (result)
        LicenseHolders.Remove(myLicenseHolder);
}

private RelayCommand<LicenseHolder> _removeLicenseHoldersCommand;

public RelayCommand<LicenseHolder> RemoveLicenseHoldersCommand => _removeLicenseHoldersCommand
    ??= new RelayCommand<LicenseHolder>(RemoveLicenseHolderExecute, RemoveLicenseHolderCanExecute);

private bool RemoveLicenseHolderCanExecute(LicenseHolder myLicenseHolder) {

    return LicenseHolders.Contains(myLicenseHolder);
}