DateTime abstraction

gistfile1.cs

using System;
using System.Diagnostics;
using Apex.Utility.Internal;


namespace Utility
{
	/// <summary>
	/// The SystemTime class provides a simple abstraction over DateTime.Now.
	/// It uses a time provider to generate the current time. The default
	/// provider just fowards to DateTime.Now/UtcNow.
	/// </summary>
	public static class SystemTime
	{
		public static DateTime Now
		{
			[DebuggerStepThrough]
			get { return TimeProvider.CurrentProvider.Now; }
		}

		public static DateTime UtcNow
		{
			[DebuggerStepThrough]
			get { return TimeProvider.CurrentProvider.UtcNow; }
		}
	}
}

using System;


namespace Utility.Internal
{
	public abstract class TimeProvider
	{
		public static TimeProvider CurrentProvider = new DefaultTimeProvider();

		public abstract DateTime Now { get; }
		public abstract DateTime UtcNow { get; }
	}
}

using System;
using System.Diagnostics;


namespace Utility.Internal
{
	public class DefaultTimeProvider : TimeProvider
	{
		public override DateTime Now
		{
			[DebuggerStepThrough]
			get { return DateTime.Now; }
		}

		public override DateTime UtcNow
		{
			[DebuggerStepThrough]
			get { return DateTime.UtcNow; }
		}
	}
}