1 files changed, 37 insertions, 0 deletions
diff --git a/src/Editor/Core/Def/ContentType/FileNameAttribute.cs b/src/Editor/Core/Def/ContentType/FileNameAttribute.cs
new file mode 100644
index 0000000..93c270c
--- /dev/null
+++ b/src/Editor/Core/Def/ContentType/FileNameAttribute.cs
@@ -0,0 +1,37 @@
+//
+//  Copyright (c) Microsoft Corporation. All rights reserved.
+//  Licensed under the MIT License. See License.txt in the project root for license information.
+//
+using System;
+
+namespace Microsoft.VisualStudio.Utilities
+{
+    /// <summary>
+    /// Identifies a file name.
+    /// </summary>
+    public sealed class FileNameAttribute : SingletonBaseMetadataAttribute
+    {
+        /// <summary>
+        /// Constructs a new instance of the attribute.
+        /// </summary>
+        /// <param name="fileName">The file extension.</param>
+        /// <exception cref="ArgumentNullException"><paramref name="fileName"/> is null or empty.</exception>
+        public FileNameAttribute(string fileName)
+        {
+            if (string.IsNullOrWhiteSpace(fileName))
+            {
+                throw new ArgumentNullException(nameof(fileName));
+            }
+
+            this.FileName = fileName;
+        }
+
+        /// <summary>
+        /// Gets the file name.
+        /// </summary>
+        public string FileName
+        {
+            get;
+        }
+    }
+}