Added VersionStringComparer

AMWD.Common/Comparer/VersionStringComparer.cs

@@ -0,0 +1,86 @@
+using System;
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+
+namespace AMWD.Common.Comparer
+{
+	/// <summary>
+	/// Defines a method to compare two <see cref="Version"/> strings.
+	/// </summary>
+#if NET8_0_OR_GREATER
+	public partial class VersionStringComparer : IComparer<string>
+	{
+		private readonly Regex _versionRegex = VersionRegex();
+#else
+
+	public class VersionStringComparer : IComparer<string>
+	{
+		private readonly Regex _versionRegex = new("([0-9.]+)");
+#endif
+
+		/// <summary>
+		/// Compares two <see cref="Version"/> strings and returns a value indicating
+		/// whether one is less than, equal to, or greater than the other.
+		/// </summary>
+		/// <param name="x">The first version string.</param>
+		/// <param name="y">The second version string.</param>
+		/// <returns>
+		/// A signed integer that indicates the relative values of x and y, as shown in the following table:
+		/// <list type="table">
+		///   <listheader>
+		///     <term>Value</term>
+		///     <description>Meaning</description>
+		///   </listheader>
+		///   <item>
+		///     <term>-1</term>
+		///     <description>x is less than y</description>
+		///   </item>
+		///   <item>
+		///     <term>0</term>
+		///     <description>x equals y</description>
+		///   </item>
+		///   <item>
+		///     <term>1</term>
+		///     <description>x is greater than y</description>
+		///   </item>
+		/// </list>
+		/// </returns>
+		public int Compare(string x, string y)
+		{
+			if (string.IsNullOrWhiteSpace(x) && string.IsNullOrWhiteSpace(y))
+				return 0;
+
+			if (string.IsNullOrWhiteSpace(x))
+				return -1;
+
+			if (string.IsNullOrWhiteSpace(y))
+				return 1;
+
+			string xMainVersion = _versionRegex.Match(x).Groups[1].Value;
+			string yMainVersion = _versionRegex.Match(y).Groups[1].Value;
+
+			string xAppendix = x.ReplaceStart(xMainVersion, "");
+			string yAppendix = y.ReplaceStart(yMainVersion, "");
+
+			if (xMainVersion.IndexOf('.') < 0)
+				xMainVersion += ".0";
+
+			if (yMainVersion.IndexOf('.') < 0)
+				yMainVersion += ".0";
+
+			var xVersion = Version.Parse(xMainVersion);
+			var yVersion = Version.Parse(yMainVersion);
+
+			int versionResult = xVersion.CompareTo(yVersion);
+			if (versionResult != 0)
+				return versionResult;
+
+			return xAppendix.CompareTo(yAppendix);
+		}
+
+#if NET8_0_OR_GREATER
+		[GeneratedRegex("([0-9.]+)")]
+		private static partial Regex VersionRegex();
+#endif
+	}
+}