Min - Grouped

Query

public void Linq83()
{
    List products = GetProductList();
  
    var categories =
        from p in products
        group p by p.Category into g
        select new { Category = g.Key, CheapestPrice = g.Min(p => p.UnitPrice) };
  
    ObjectDumper.Write(categories);
}

Lambda Expression

public void Linq83()
{
    List products = GetProductList();
 
    var categories = products.GroupBy(prod => prod.Category).Select(prodGroup => new {Category = prodGroup.Key, CheapestPrice = prodGroup.Min(p => p.UnitPrice)});
 
    ObjectDumper.Write(categories);
}

Output

Category=Beverages CheapestPrice=4.5000
Category=Condiments CheapestPrice=10.0000
Category=Produce CheapestPrice=10.0000
Category=Meat/Poultry CheapestPrice=7.4500
Category=Seafood CheapestPrice=6.0000
Category=Dairy Products CheapestPrice=2.5000
Category=Confections CheapestPrice=9.2000
Category=Grains/Cereals CheapestPrice=7.0000