C#

public static class Letters
{
    private static readonly Random random = new Random((int)DateTime.Now.Ticks);
    public static readonly char[] AllowedLetters = new char[]{
        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
        'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
    };

    public static Char GetRandomLetter()
    {
        return AllowedLetters[random.Next(0, AllowedLetters.Length - 1)];
    }
}

public class LetterGrid
{
    public const int MinSize = 8;
    public const int MaxSize = 32;

    private int size;
    private char[][] letters;

    public LetterGrid(int size)
    {
        if (size < MinSize || size > MaxSize)
            throw new ArgumentOutOfRangeException(
                "Size",
                string.Format("Size must be between {0} and {1}",
                    MinSize, MaxSize));
        this.size = size;
        letters = new char[size][]; // create rows
        for (int row = 0; row < size; row++) // iterate over rows
        {
            letters[row] = new char[size]; // create columns
            for (int column = 0; column < size; column++)
                letters[row][column] = Letters.GetRandomLetter();
        }
    }

    public char this[int row, int column]
    {
        get { return letters[row][column]; }
        set
        {
            // ToDo: Check value is valid
            letters[row][column] = value;
        }
    }

    public int Size
    {
        get { return size; }
    }

    public bool AddWord(string word, int row, int column, Direction direction)
    {
        bool result = false;
        char[] letters = word.ToCharArray();

        // ToDo: Check word will fit inside grid and if so, change letters.

        return result;
    }
}

public enum Direction
{
    Horizontal = 0,
    Vertical = 1,
    DiagonalPositive = 2,
    DiagonalNegative = 3,
    HorizontalReversed = 4,
    VerticalReversed = 5,
    DiagonalPositiveReversed = 6,
    DiagonalNegativeReversed = 7,
}

public class SomeClass()
{
    public int MyProperty  { get ; set ; }
}

public class SomeClass()
{
    public int MyProperty  { get ; private set ; }
}

public class SomeClass()
{
    private int myProperty;

    public int MyProperty
    {
        get {return myProperty;}

        set 
        {
            if ( value <= 0 )
            {
                throw something ;
            }

            myProperty = value;
        }
    }
}

PIEBALDconsult wrote:

you could make it an automatic property instead:

PIEBALDconsult wrote:

some times you need to do more work in a Property

using System;
using System.ComponentModel;

public class PercentageControl : Component
{
    private const int DefaultPercentage = 50;
    public const int MaxPercentage = 100;
    public const int MinPercentage = 0;

    public event EventHandler PercentageChanged;

    private int percentage;

    public PercentageControl()
    {
        percentage = DefaultPercentage;
    }

    [DefaultValue(50)]
    public int Percentage
    {
        get { return percentage; }
        set
        {
            if (value >= MinPercentage && value <= MaxPercentage)
            {
                if (value != percentage)
                {
                    percentage = value;
                    OnPercentageChanged(EventArgs.Empty);
                }
            }
            else
            {
                throw new ArgumentOutOfRangeException(
                    "Percentage",
                    string.Format("Percentage must be between {0} and {1}",
                        MinPercentage, MaxPercentage));
            }
        }
    }

    protected virtual void OnPercentageChanged(EventArgs e)
    {
        EventHandler eh = PercentageChanged;
        if (eh != null)
            eh(this, e);
    }
}

Roger Wright wrote:

how does this construct "know" to associate the public MyProperty with the private myProperty

Roger Wright wrote:

...created all the form data members as private

Richard Blythe wrote:

By the way a property is compiled into two methods. get_Speed() and set_Speed().

Richard Blythe wrote:

so old dogs can learn new tricks!

Roger Wright wrote:

Question About Class Properties

electriac wrote:

the new form will not receive input unless I click on it

electriac wrote:

the compiler is the active form