SemVer.PartialVersion.ToZeroVersion C# (CSharp) Method

        public Version ToZeroVersion()
        {
            return new Version(
                    Major ?? 0,
                    Minor ?? 0,
                    Patch ?? 0,
                    PreRelease);
        }

        // Allows patch-level changes if a minor version is specified
        // on the comparator. Allows minor-level changes if not.
        public static Tuple<int, Comparator[]> TildeRange(string spec)
        {
            string pattern = String.Format(@"^\s*~\s*({0}+)\s*", versionChars);

            var regex = new Regex(pattern);
            var match = regex.Match(spec);
            if (!match.Success)
            {
                return null;
            }

            Version minVersion = null;
            Version maxVersion = null;

            var version = new PartialVersion(match.Groups[1].Value);
            if (version.Minor.HasValue)
            {
                // Doesn't matter whether patch version is null or not,
                // the logic is the same, min patch version will be zero if null.
                minVersion = version.ToZeroVersion();
                maxVersion = new Version(version.Major.Value, version.Minor.Value + 1, 0);
            }
            else
            {
                minVersion = version.ToZeroVersion();
                maxVersion = new Version(version.Major.Value + 1, 0, 0);
            }

            return Tuple.Create(
                    match.Length,
                    minMaxComparators(minVersion, maxVersion));
        }