a wrapper that can never be null

NotNull.cs

public struct NotNull<T>
{
	private T _value;
	public T Value {
		get
		{
			return _value;
		}
		set
		{
			if(value == null)
			{
				throw new ArgumentNullException("value can never be null");
			}
			_value = value;
		}
	}
	public NotNull(T value)
	{
	
		if(value == null)
		{
			throw new ArgumentNullException("value can never be null");
		}
		
		_value = value;
	}
}