Unity version parser

UnityVersionParser.cs

using System;
using System.Text.RegularExpressions;

namespace LostPolygon.Shared {
    internal class UnityVersionParser {
        private readonly int _versionMajor = -1;
        private readonly int _versionMinor = -1;
        private readonly int _versionPatch = -1;
        private readonly UnityBuildType _versionBuildType = UnityBuildType.Unknown;
        private readonly int _versionReleaseNumber = -1;

        public UnityVersionParser(string unityVersion) {
            Match versionMatch = Regex.Match(unityVersion, @"(\d+)\.(\d+)\.(\d+)([bpf])?(\d+)?");
            _versionMajor = Convert.ToInt32(versionMatch.Groups[1].Value);
            _versionMinor = Convert.ToInt32(versionMatch.Groups[2].Value);
            _versionPatch = Convert.ToInt32(versionMatch.Groups[3].Value);
            if (versionMatch.Groups.Count > 4) {
                string versionBuildType = versionMatch.Groups[4].Value;
                switch (versionBuildType) {
                    case "f":
                        _versionBuildType = UnityBuildType.Release;
                        break;
                    case "p":
                        _versionBuildType = UnityBuildType.Patch;
                        break;
                    case "b":
                        _versionBuildType = UnityBuildType.Beta;
                        break;
                    default:
                        _versionBuildType = UnityBuildType.Unknown;
                        break;
                }

                _versionReleaseNumber = Convert.ToInt32(versionMatch.Groups[5].Value);
            }
        }

        public int GetUnityVersionNumeric() {
            return _versionMajor * 100 + _versionMinor * 10 + _versionPatch;
        }

        public int VersionMajor {
            get {
                return _versionMajor;
            }
        }

        public int VersionMinor {
            get {
                return _versionMinor;
            }
        }

        public int VersionPatch {
            get {
                return _versionPatch;
            }
        }

        public UnityBuildType VersionBuildType {
            get {
                return _versionBuildType;
            }
        }

        public int VersionReleaseNumber {
            get {
                return _versionReleaseNumber;
            }
        }

        public enum UnityBuildType {
            Unknown,
            Release,
            Beta,
            Patch
        }
    }
}