ServiceErrorInterceptorErrorMessages.cs

public override void OnInvoke(MethodInterceptionArgs args)
{
	try
	{
		args.Proceed();
	}
	catch (SqlException ex)
	{
		var obj = (ServiceBase) args.Instance;
		if (ex.Message.Contains("The DELETE statement conflicted with the REFERENCE constraint"))
			obj.AddValidationError("This item can't be deleted because it is still used by other items.");
		else
		{
			obj.AddValidationError(GetErrorMessage(ex));
			if (!IsThisSite.RunningLocally)
				ex.ToExceptionless().Submit();
		}
		ErrorReturn(args);
	}
	catch (NotImplementedException)
	{
		// if something's not implemented, just throw it up
		throw;
	}
	catch (Exception ex)
	{
		if (!IsThisSite.RunningLocally)
			ex.ToExceptionless().Submit();
		var obj = (ServiceBase)args.Instance;
		obj.AddValidationError(GetErrorMessage(ex));
		ErrorReturn(args);
	}
}

private string GetErrorMessage(Exception ex)
{
	if(IsThisSite.RunningLocally)
		return "There was an error. Please try again later. (" + ex.Message + "), (" + ex.GetType().FullName + ")";
	return "There was an error. Please try again later.";
}