public static System.Linq.Expressions.Expression <Func <T, bool> > Or <T>(this System.Linq.Expressions.Expression <Func <T, bool> > first, System.Linq.Expressions.Expression <Func <T, bool> > second)
 {
     return(first.Compose(second, System.Linq.Expressions.Expression.OrElse));
 }
 public static System.Linq.Expressions.Expression <Func <T, bool> > And <T>(this System.Linq.Expressions.Expression <Func <T, bool> > first, System.Linq.Expressions.Expression <Func <T, bool> > second)
 {
     return(first.Compose(second, System.Linq.Expressions.Expression.AndAlso));
 }