use IsMatch() instead of Matches()

Author: anamnavi

src/code/LocalServerApiCalls.cs

@@ -261,28 +261,17 @@ private FindResults FindNameHelper(string packageName, string[] tags, bool inclu
 
             // this regex pattern matches packageName followed by a version (4 digit or 3 with prerelease word)
             string regexPattern = $"{packageName}" + @"(\.\d+){1,3}(?:[a-zA-Z0-9-.]+|.\d)?\.nupkg";
-            Regex rx = new Regex(regexPattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
             _cmdletPassedIn.WriteDebug($"package file name pattern to be searched for is: {regexPattern}");
 
             foreach (string path in Directory.GetFiles(Repository.Uri.LocalPath))
             {
                 string packageFullName = Path.GetFileName(path);
-                MatchCollection matches = rx.Matches(packageFullName);
-                if (matches.Count == 0)
-                {
-                    continue;
-                }
-
-                Match match = matches[0];
-
-                GroupCollection groups = match.Groups;
-                if (groups.Count == 0)
+                bool isMatch = Regex.IsMatch(packageFullName, regexPattern, RegexOptions.IgnoreCase);
+                if (!isMatch)
                 {
                     continue;
                 }
 
-                Capture group = groups[0];
-
                 NuGetVersion nugetVersion = GetInfoFromFileName(packageFullName: packageFullName, packageName: packageName, actualName: out actualPkgName, out errRecord);
                 _cmdletPassedIn.WriteDebug($"Version parsed as '{nugetVersion}'");
 
@@ -389,30 +378,19 @@ private FindResults FindVersionHelper(string packageName, string version, string
 
             // this regex pattern matches packageName followed by the requested version
             string regexPattern = $"{packageName}.{requiredVersion.ToNormalizedString()}" + @".nupkg";
-            Regex rx = new Regex(regexPattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
             _cmdletPassedIn.WriteDebug($"pattern is: {regexPattern}");
             string pkgPath = String.Empty;
             string actualPkgName = String.Empty;
 
             foreach (string path in Directory.GetFiles(Repository.Uri.LocalPath))
             {
                 string packageFullName = Path.GetFileName(path);
-                MatchCollection matches = rx.Matches(packageFullName);
-                if (matches.Count == 0)
-                {
-                    continue;
-                }
-
-                Match match = matches[0];
-
-                GroupCollection groups = match.Groups;
-                if (groups.Count == 0)
+                bool isMatch = Regex.IsMatch(packageFullName, regexPattern, RegexOptions.IgnoreCase);
+                if (!isMatch)
                 {
                     continue;
                 }
 
-                Capture group = groups[0];
-
                 NuGetVersion nugetVersion = GetInfoFromFileName(packageFullName: packageFullName, packageName: packageName, actualName: out actualPkgName, out errRecord);
                 _cmdletPassedIn.WriteDebug($"Version parsed as '{nugetVersion}'");