I have extracted the relevant code for you to focus on:

[MetadataTypeAttribute(typeof(StudentAttendance.StudentAttendanceMetadata))]
	[DisplayName("Student Attendance Register")]
	public partial class StudentAttendance
	{

		// This class allows you to attach custom attributes to properties
		// of the StudentAttendance class.
		//
		// For example, the following marks the Xyz property as a
		// required property and specifies the format for valid values:
		//    [Required]
		//    [RegularExpression("[A-Z][A-Za-z0-9]*")]
		//    [StringLength(32)]
		//    public string Xyz { get; set; }
		internal sealed class StudentAttendanceMetadata
		{

			// Metadata classes are not meant to be instantiated.
			private StudentAttendanceMetadata()
			{
			}
			[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:d}")]
			public DateTime Date { get; set; }

			[ScaffoldColumn(false)]
			public long ID { get; set; }

			public bool Late { get; set; }

			public bool Present { get; set; }

			public Student Student { get; set; }

			public long StudentID { get; set; }
		}
	}