binding_errors.cs

// example:
public partial class App : Application
{
  protected override void OnStartup(StartupEventArgs e)
  {
    BindingErrors.Throw();

    // app gubbins here
  }
}


// code:
public static class BindingErrors
{
  public static void Throw()
  {
    PresentationTraceSources.DataBindingSource.Listeners.Add(new BindingErrorListener
    {
      TraceOutputOptions = TraceOptions.None
    });
    PresentationTraceSources.DataBindingSource.Switch.Level = SourceLevels.Error;
  }
}

public class BindingErrorListener : DefaultTraceListener
{
  readonly StringBuilder builder = new StringBuilder();

  public override void Write(string message)
  {
    builder.Append(message);
  }

  public override void WriteLine(string message)
  {
    builder.Append(message);

    var fullMessage = builder.ToString();

    builder.Length = 0;

    throw new BindingException(fullMessage);
  }
}

public class BindingException : Exception
{
  public BindingException(string message)
    : base(message)
  {}
}