using System.Collections.Generic;
    using DevExpress.DataAccess;
    using DevExpress.DataAccess.ObjectBinding;
    // ...

    public class Employee {
        public string Name { get; set; }
        public string Position { get; set; }
    }
    // The class that fetches data to the ObjectDataSource.
    [DisplayName("Employees")]
    [HighlightedClass]
    public class EmployeeDataSource {
        private string department;
        private List<Employee> management = new List<Employee>() {
            new Employee() {
                Name = "Ana Trujillo",
                Position = "CEO"
            },
            new Employee() {
                Name = "Andrew Fuller",
                Position = "Vice President, Sales"
            }
        };
        private List<Employee> financial = new List<Employee>() {
            new Employee() {
                Name = "Nancy Davolio",
                Position = "Accountant"
            },
            new Employee() {
                Name = "Maria Anders",
                Position = "Accountant"
            }
        };
        private List<Employee> sales = new List<Employee>() {
            new Employee() {
                Name = "Antonio Moreno",
                Position = "Sales Representative"
            },
            new Employee() {
                Name = "Thomas Hardy",
                Position = "Sales Representative"
            },
            new Employee() {
                Name = "Christina Berglund",
                Position = "Order Administrator"
            },
            new Employee() {
                Name = "Frédérique Citeaux",
                Position = "Marketing Manager"
            },
            new Employee() {
                Name = "Hanna Moos",
                Position = "Sales Representative"
            }
        };
        public Employees() {
            this.department = "Management";
        }
        // The HighlightedMember attribute highlights a constructor.
        [HighlightedMember]
        public Employees(string department) {
            this.department = department;
        }
        // The HighlightedMember attribute highlights a data member.
        [HighlightedMember]
        public IEnumerable<Employee> GetEmployeeList(int recordCount) {
            List<Employee> employees = new List<Employee>();
            if (this.department == "management")
                employees = this.management;
            if (this.department == "financial")
                employees = this.financial;
            if (this.department == "sales")
                employees = this.sales;
            foreach (var employee in employees)
                if (recordCount-->0)
                    yield return employee;
        }
    }

Imports System.Collections.Generic
    Imports DevExpress.DataAccess
    Imports DevExpress.DataAccess.ObjectBinding
    ' ...

    Public Class Employee
        Public Property Name() As String
        Public Property Position() As String
    End Class
    ' The class that fetches data to the ObjectDataSource.
    <DisplayName("Employees"), HighlightedClass>
    Public Class EmployeeDataSource
        Private department As String
        Private management As New List(Of Employee)() From {
            New Employee() With {.Name = "Ana Trujillo", .Position = "CEO"},
            New Employee() With {.Name = "Andrew Fuller", .Position = "Vice President, Sales"}
        }
        Private financial As New List(Of Employee)() From {
            New Employee() With {.Name = "Nancy Davolio", .Position = "Accountant"},
            New Employee() With {.Name = "Maria Anders", .Position = "Accountant"}
        }
        Private sales As New List(Of Employee)() From {
            New Employee() With {.Name = "Antonio Moreno", .Position = "Sales Representative"},
            New Employee() With {.Name = "Thomas Hardy", .Position = "Sales Representative"},
            New Employee() With {.Name = "Christina Berglund", .Position = "Order Administrator"},
            New Employee() With {.Name = "Frédérique Citeaux", .Position = "Marketing Manager"},
            New Employee() With {.Name = "Hanna Moos", .Position = "Sales Representative"}
        }
        Private Function Employees() As Public
            Me.department = "Management"
        End Function
        ' The HighlightedMember attribute highlights a constructor.
        <HighlightedMember>
        Private Function Employees(ByVal department As String) As Public
            Me.department = department
        End Function
        ' The HighlightedMember attribute highlights a data member.
        <HighlightedMember>
        Public Iterator Function GetEmployeeList(ByVal recordCount As Integer) As IEnumerable(Of Employee)
            Dim employeesList As New List(Of Employee)()
            If Me.department = "management" Then
                employeesList = Me.management
            End If
            If Me.department = "financial" Then
               employeesList = Me.financial
            End If
            If Me.department = "sales" Then
                employeesList = Me.sales
            End If
            For Each employee In employeesList
                Dim tempVar As Boolean = recordCount>0
                recordCount -= 1
                If tempVar Then
                    Yield employee
                End If
            Next employee
        End Function
    End Class

using DevExpress.DataAccess.ObjectBinding;
    // ...
    [assembly: AssemblyTrademark("")]
    [assembly: AssemblyCulture("")]
    [assembly: HighlightedAssembly]
    // ...

Imports DevExpress.DataAccess.ObjectBinding
    ' ...
    <Assembly: AssemblyTrademark("")> 
    <Assembly: ComVisible(False)>
    <Assembly: HighlightedAssembly> 
    ' ...