Initial implementation

Examples/Common/Extensions/StringExtensions.cs

@@ -0,0 +1,41 @@
+using System.Text.RegularExpressions;
+
+namespace Common.Extensions;
+
+/// <summary>
+/// Extensions for the string object type
+/// </summary>
+public static class StringExtensions
+{
+  private static readonly Regex patternRegex = new Regex(@"^\*$");
+
+  /// <summary>
+  /// Determines whether this string contains the specified string. Not case sensitive.
+  /// </summary>
+  /// <param name="source">   The source.</param>
+  /// <param name="contained">The contained.</param>
+  public static bool ContainsIgnoreCase(this string source, string contained)
+  {
+    return source?.IndexOf(contained, StringComparison.InvariantCultureIgnoreCase) >= 0;
+  }
+
+  /// <summary>
+  /// Expands a path containing a wildcard pattern
+  /// </summary>
+  /// <param name="self"></param>
+  /// <returns></returns>
+  public static ICollection<string> ExpandPath(this string self)
+  {
+    string pattern = Path.GetFileName(self);
+    if (patternRegex.IsMatch(pattern))
+    {
+      return Directory.GetFiles(
+        self.Substring(0, self.Length - pattern.Length),
+        pattern,
+        SearchOption.TopDirectoryOnly
+      );
+    }
+
+    return new[] { self };
+  }
+}