Code:

public class ProductSorting : IComparable<Product>
{     

 public static Comparison<Product> PriceComparison =      
  delegate(Product p1, Product p2) 
       {            return p1.Price.CompareTo(p2.Price);       
 };    

public static Comparison<Product> IDComparison =        
delegate(Product p1, Product p2)   
{  
 return p1.ProductID.CompareTo(p2.ProductID);    
   
};  

public int CompareTo(Product other)   
{        
return ProductName.CompareTo(other.ProductName);  

}


}
//negde u kodu 

List<Product> items = new List<Product>() ; 
items.Add(...) ; 
..
..
items.Sort(ProductSorting.IDComparison) ;
items.Sort(ProductSorting.PriceComparison ) ;

Code:

    class Person
    {
        public int ID; public string ime;
    }

    class Program
    {
        static void Main(string[] args)
        {
            IList<Person> ilista = new List<Person>() { new Person() { ID = 12, ime = "Pera"},
                                                        new Person() { ID = 1, ime = "Zika"},
                                                        new Person() { ID = 7, ime = "Aska"}};

            string imePolja = "ID";
            FieldInfo field = ilista.GetType().GetGenericArguments()[0].GetField(imePolja);
            var sortedlista = (from p in ilista
                               orderby field.GetValue(p)
                               select p).ToList();

            var sortedlista2 = ilista.AsEnumerable().OrderBy(x => x.ime).ToList();
        }
    }