Basic Upsert substitute

LiteDB.Extensions.Upsert.cs

using System;
using LiteDB;

namespace LiteDB.Extensions {
	public static class LiteCollectionX {
		/// <summary>
		/// Upserts the specified value.
		/// </summary>
		/// <typeparam name="T"></typeparam>
		/// <param name="collection">The collection within which to upsert the <paramref name="value"/>.</param>
		/// <param name="value">The value to upsert.</param>
		public static void Upsert<T>(this LiteCollection<T> collection, T value) where T : new() {
			if (!collection.Update(value)) {
				collection.Insert(value);
			}
		}
		public static void Upsert<T>(this LiteCollection<T> collection, T value, Func<T, BsonValue> keySelector) where T : new() {
			if (!collection.Update(keySelector(value), value)) {
				collection.Insert(value);
			}
		}
	}
}