class Student

{

public int Id;

public string Name;

}

static DataTable GetDataTable(Student[] students)

{

DataTable table = new DataTable();

table.Columns.Add("Id", typeof(Int32));

table.Columns.Add("Name", typeof(string));

foreach (Student student in students)

{

table.Rows.Add(student.Id, student.Name);

}

return (table);

}

The OutputDataTableHeader Method

static void OutputDataTableHeader(DataTable dt, int columnWidth)

{

string format = string.Format("{0}0,-{1}{2}", "{", columnWidth, "}");

// Display the column headings.

foreach(DataColumn column in dt.Columns)

{

Console.Write(format, column.ColumnName);

}

Console.WriteLine();

foreach(DataColumn column in dt.Columns)

{

for(int i = 0; i < columnWidth; i++)

{

Console.Write("=");

}

}

Console.WriteLine();

}

---------------------

Distinct

The Distinct Prototype

public static IEnumerable<T> Distinct<T> (

this IEnumerable<T> source,

IEqualityComparer<T> comparer);

Student[] students = {

new Student { Id = 1, Name = "Joe Rattz" },

new Student { Id = 6, Name = "Ulyses Hutchens" },

new Student { Id = 19, Name = "Bob Tanko" },

new Student { Id = 45, Name = "Erin Doutensal" },

new Student { Id = 1, Name = "Joe Rattz" },

new Student { Id = 12, Name = "Bob Mapplethorpe" },

new Student { Id = 17, Name = "Anthony Adams" },

new Student { Id = 32, Name = "Dignan Stephens" }<