C# attribute that allows string representation of enum members & an extension method to get that string representation from an enum member.

EnumLabel.cs

public class EnumLabelAttribute : Attribute
{
	public string Label { get; private set; }
	public EnumLabelAttribute(string label) { Label = label; }
}

public static class EnumLabelExtension
{
	public static string GetLabel(this Enum @enum)
	{
		string value = null;
		var fieldInfo = @enum.GetType().GetField(@enum.ToString());
		var attrs = fieldInfo.GetCustomAttributes(typeof(EnumLabelAttribute), false) as EnumLabelAttribute[];
		if (attrs != null) value = attrs.Length > 0 ? attrs[0].Label : null;
		return value;
	}
}
// ============================================================================================
// sample usage
public enum Sample
{
        [EnumLabel("Hello World!")]
        HelloWorld = 1,
        [EnumLabel("Foo to the bar")]
        FooBar = 2
}

var label = Sample.FooBar.GetLabel(); // label is assigned the value "Foo to the bar"

In response to a comment left at http://codereview.stackexchange.com/a/39168/6172, I thought it might be interesting to post a version I wrote, which can handle multiple [Description] attributes, or one, or none. If there are none, it attempts to create a nicely-formatted version of the enum member's name instead (via regex):

    private static readonly Regex nonAlpha = new Regex("((?<=[a-z])[A-Z]|[A-Z](?=[a-z]))", RegexOptions.Compiled);

    /// <summary>
    /// Gets the description.
    /// </summary>
    /// <param name="enumType">Type of the enum.</param>
    /// <returns>The description on the enum member, or the name, with non-alpha characters replaced by
    /// spaces.</returns>
    internal static string GetDescription(this Enum enumType)
    {
        var sb = new StringBuilder();
        var notFirst = false;

        foreach (var attr in enumType.GetType().GetField(enumType.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), false))
        {
            if (notFirst)
            {
                sb.AppendLine();
            }

            sb.Append(((DescriptionAttribute)attr).Description);
            notFirst = true;
        }

        var description = sb.ToString();

        return string.IsNullOrEmpty(description)
            ? nonAlpha.Replace(enumType.ToString(), " $1").Trim()
            : description;
    }

More C# enum examples...

http://csharp.net-informations.com/statements/enum.htm