Foldr.cs

public static class Extensions
{
	public static bool And(this IEnumerable<bool> bools)
	{	
		return bools.Foldr(Expression.AndAlso, true);
	}
	
	public static T Foldr<T>(this IEnumerable<T> enumerable, Func<Expression, Expression, BinaryExpression> fold, T v)
	{	
		foreach(var b in enumerable)
		{
			var h = Expression.Parameter(typeof(T), "h");
			var t = Expression.Parameter(typeof(T), "t");
			
			return Expression.Lambda<Func<T, T, T>>(fold(h, t), h, t)
				.Compile()
				.Invoke(b, Foldr(enumerable.Skip(1), fold, v));
		}
		
		return v;
	}
	
	public static bool All_<T>(this IEnumerable<T> enumerable, Func<T, bool> p)
	{
		return enumerable.Select(p).And();
	}
}