Get diff

This explains how to get diff information for a project.

public void GetAllDifference(ICommandContext c, ICommandParams p)
{
    //Get the comparison results for the current project
    var project = c.App.Workspace.CurrentProject;
    IModelComparison comparison = c.App.Diff.GetComparison(project);

    //Get the comparison information that extracts the differences
    IMatchCollection matches = comparison.GetDifferencedMatches();
    foreach (IMatch match in matches)
    {
        foreach (IDifference difference in match.Differences)
        {
            if (difference.IsNewItem)
            {
                //For additional differences, get the added model with IMatch.Reference
                IModel model = match.Reference;
                c.App.Output.WriteLine("Show Diff", $"{model.Name} has been added.");
            }
            if (difference.IsOldItem)
            {
                //In the case of deletion diff, the deleted model is obtained with IMatch.Target
                IModel model = match.Target;
                c.App.Output.WriteLine("Show Diff", $"{model.Name} has been deleted.");
            }
            if (difference.IsUpdateItem)
            {
                IModel model = match.Reference;
                c.App.Output.WriteLine("Show Diff", $"Field: {difference.Field} of {model.Name} has been updated from {difference.OldValue} to {difference.NewValue}.");
            }
        }
    }