Example SelectMany, Parallell, GroupBy and Select using anonymous objects

LinqPadExampleSelectMAny.cs

public class Contract
{
	public string Code {get; set;}	
}

public class Charge
{
	public string Name {get; set;}
	public decimal Total {get; set;}
}


void Main()
{
	IList<KeyValuePair<Contract, List<Charge>>> values = new List<KeyValuePair<Contract, List<Charge>>>();
	values.Add(new KeyValuePair<Contract, List<Charge>>(new Contract() { Code = "Contract1"}, new List<Charge>() 
	{
		new Charge() { Name = "Charge1", Total = 5},
		new Charge() { Name = "Charge2", Total = 2}
	}));
	values.Add(new KeyValuePair<Contract, List<Charge>>(new Contract() { Code = "Contract1"}, new List<Charge>() 
	{
		new Charge() { Name = "Charge1", Total = 5},
		new Charge() { Name = "Charge6", Total = 7}
	}));
	values.Add(new KeyValuePair<Contract, List<Charge>>(new Contract() { Code = "Contract2"}, new List<Charge>() 
	{
		new Charge() { Name = "Charge3", Total = 4},
		new Charge() { Name = "Charge4", Total = 3}
	}));	
	
	values.Dump();
 	var singleList = values.AsParallel().SelectMany(x => x.Value.Select(v => new { Contract = x.Key, Charge = v}));	
	singleList.Dump();
	
	var grouped = singleList.GroupBy(x => new { Code = x.Contract.Code, Name = x.Charge.Name })
							.Select(s => new { Contract = s.Key.Code, Name = s.Key.Name, Total = s.Sum(i => i.Charge.Total)} ).ToList();
	grouped.Dump();
}