Shaolinq.Persistence.SqlValuesEnumerable.IsEmpty C# (CSharp) Method

		public bool IsEmpty()
		{
			var value = this.inner;

			if (value == null)
			{
				return true;
			}

			var type = value.GetType();
			PropertyInfo countProperty;

			if (type.IsArray)
			{
				return (((Array)value).Length == 0);
			}
			else if ((countProperty = type.GetProperty("Count")) != null)
			{
				Func<object, int> counter = null;

				if (!getCountFuncs.TryGetValue(type, out counter))
				{
					var param = Expression.Parameter(typeof(object));
					var body = Expression.Property(Expression.Convert(param, type), countProperty);

					counter = (Func<object, int>)Expression.Lambda(body, param).Compile();

					getCountFuncs = getCountFuncs.Clone(type, counter, "getCountFuncs");
				}

				var count = counter?.Invoke(value);

				return count == 0;
			}
			else 
			{
				var enumerator = value.GetEnumerator();

				while (enumerator.MoveNext())
				{
					return false;
				}

				return true;
			}
		}