Master Detail Common Selector

Show how to implement Master detail reading where record contains characters

Input.txt

@ALFKI|Alfreds Futterkiste|Maria Anders|Sales Representative|Obere Str. 57|Berlin|Germany
10248|ALFKI|5|04071996|01081996|16071996|3|32.38
10249|ALFKI|6|05071996|16081996|10071996|1|11.61
10251|ALFKI|3|08071996|05081996|15071996|1|41.34
@ANATR|Ana Trujillo Emparedados y helados|Ana Trujillo|Owner|Avda. de la Constitución 2222|México D.F.|Mexico
10252|ANATR|4|09071996|06081996|11071996|2|51.3
@ANTON|Antonio Moreno Taquería|Antonio Moreno|Owner|Mataderos  2312|México D.F.|Mexico

RunEngine.cs

var engine = new MasterDetailEngine<Customers, Orders>
    (CommonSelector.MasterIfContains, "@");

// to Read use:
var res = engine.ReadFile("Input.txt");

// to Write use:
engine.WriteFile("Output.txt", res);

Master layout.cs

/// <summary>
/// Layout of the master records beginning with alpha characters in input
/// </summary>
[DelimitedRecord("|")]
[IgnoreEmptyLines]
public class Customers
{
    public string CustomerID;
    public string CompanyName;
    public string ContactName;
    public string ContactTitle;
    public string Address;
    public string City;
    public string Country;
}

Detail layout.cs

/// <summary>
/// Layout of the detail records beginning with numerics in input
/// </summary>
[DelimitedRecord("|")]
public class Orders
{
    public int OrderID;
    public string CustomerID;
    public int EmployeeID;
    public DateTime OrderDate;
    public DateTime RequiredDate;
    public DateTime ShippedDate;
    public int ShipVia;
    public decimal Freight;
}

Output.txt

@ALFKI|Alfreds Futterkiste|Maria Anders|Sales Representative|Obere Str. 57|Berlin|Germany
10248|ALFKI|5|04071996|01081996|16071996|3|32.38
10249|ALFKI|6|05071996|16081996|10071996|1|11.61
10251|ALFKI|3|08071996|05081996|15071996|1|41.34
@ANATR|Ana Trujillo Emparedados y helados|Ana Trujillo|Owner|Avda. de la Constitución 2222|México D.F.|Mexico
10252|ANATR|4|09071996|06081996|11071996|2|51.3
@ANTON|Antonio Moreno Taquería|Antonio Moreno|Owner|Mataderos  2312|México D.F.|Mexico