var customers = new ListIn this example, we create a new PredicateExpression and add two conditions to it: one for the first name starting with "J" and another for the last name starting with "S". We then use the AddWithAnd method to combine these conditions with the AND operator. Finally, we apply the predicate to a LINQ query that selects all customers meeting these criteria. The package library for PredicateExpression and AddWithAnd is likely the System.Linq.Expressions namespace, which is included in the .NET Framework and is commonly used for creating dynamic queries.(); // add customers to list var predicate = new PredicateExpression(); predicate.Add (c => c.FirstName.StartsWith("J")); predicate.AddWithAnd (c => c.LastName.StartsWith("S")); var filteredCustomers = customers.Where(predicate.ToExpression ());