Two helpful methods (one extension) to enable scalar values to be used in an enumerable context, without needing to create an intermediary collection

ScalarToEnumUtility.cs

namespace Your_Project
{
    using System.Collections.Generic;

    static public class Utility
    {
        /// <summary>
        /// Extension method yields the given value verbatim allowing it to be used in an enumerable context.
        /// USAGE: 1.YieldValue()
        /// EXAMPLE: listOfNumbers.Union(1.YieldValue()); // using System.Linq
        /// </summary>
        static public IEnumerable<TValue> YieldValue<TValue>(this TValue item)
        {
            yield return item;
        }

        /// <summary>
        /// Yields all the given method params to enable them in an enumerable context.
        /// USAGE: foreach(var num in Utility.Values(1, 2, 3, 4, 5, 6)); 
        /// </summary>
        static public IEnumerable<T> Values<T>(params T[] values)
        {
            if (!(values is null))
                foreach (var v in values)
                    yield return v;
        }

    }
}