添加项目文件。

TightWiki.Models/DataModels/ProcessingInstructionCollection.cs

@@ -0,0 +1,15 @@
+namespace TightWiki.Models.DataModels
+{
+    public class ProcessingInstructionCollection
+    {
+        public List<ProcessingInstruction> Collection { get; set; } = new();
+
+        /// <summary>
+        /// Returns true if the collection contains the given processing instruction.
+        /// </summary>
+        /// <param name="wikiInstruction">WikiInstruction.Protect</param>
+        /// <returns></returns>
+        public bool Contains(string wikiInstruction)
+            => Collection.Any(o => string.Equals(o.Instruction, wikiInstruction, StringComparison.InvariantCultureIgnoreCase));
+    }
+}