MVVMLight Hello World in 10 Minutes.

Getting Started

    Firstly, start VS2010, and create a new WPF project.
    Ensure that you have Nuget installed.
    Manage Nuget Package References and add ‘MVVM Light’

MVVM Light has now added a ViewModel folder containing the MainViewModel and the ViewModelLocator.
Edit the Main Window

Simply add a button, and defer the DataContext binding to the ViewModelLocator (elided):

<Window x:Class="MvvmLightTest.MainWindow"
        DataContext="{Binding Main, Source={StaticResource Locator}}">
    <Grid>
        <Button Command="{Binding ShowPopUp}" Content="Show Pop Up" />
    </Grid>
</Window>

Then in the MainViewModel we define the ShowPopUp command:

public class MainViewModel : ViewModelBase
{
    public MainViewModel()
    {
        ShowPopUp = new RelayCommand(() => ShowPopUpExecute(), () => true);
    }

    public ICommand ShowPopUp { get; private set; }

    private void ShowPopUpExecute()
    {
        MessageBox.Show("Hello!");
    }
}

Read more: Codeproject
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