Example command cleaning to prevent memory leaks.

GalaSoftCommandCleaningInVM.cs

using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Command;
    
internal class TestViewModel : ViewModel
{
    private RelayCommand myGreatCommand;
    
    // ... some stuff here
    
    public override void Cleanup()
    {
        base.Cleanup();
        this.myGreatCommand = null;
        GC.Collect();
    }
}