1 files changed, 35 insertions, 0 deletions

diff --git a/src/WixToolset.Data/WixUnexpectedFileFormatException.cs b/src/WixToolset.Data/WixUnexpectedFileFormatException.cs
new file mode 100644
index 00000000..4d1e39e9
--- /dev/null
+++ b/src/WixToolset.Data/WixUnexpectedFileFormatException.cs
@@ -0,0 +1,35 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Data
+{
+    using System;
+
+    /// <summary>
+    /// Exception when file does not match the expected format.
+    /// </summary>
+    public class WixUnexpectedFileFormatException : WixException
+    {
+        public WixUnexpectedFileFormatException(string path, FileFormat expectedFormat, FileFormat format, Exception innerException = null)
+            : base(WixDataErrors.UnexpectedFileFormat(path, expectedFormat.ToString().ToLowerInvariant(), format.ToString().ToLowerInvariant()), innerException)
+        {
+            this.Path = path;
+            this.ExpectedFileFormat = expectedFormat;
+            this.FileFormat = format;
+        }
+
+        /// <summary>
+        /// Gets the expected file format.
+        /// </summary>
+        public FileFormat ExpectedFileFormat { get; private set; }
+
+        /// <summary>
+        /// Gets the actual file format found in the file.
+        /// </summary>
+        public FileFormat FileFormat { get; private set; }
+
+        /// <summary>
+        /// Gets the path to the file with unexpected format.
+        /// </summary>
+        public string Path { get; set; }
+    }
+}