Compare updated template evaluator (#4092)

src/Sdk/Expressions/ExpressionException.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace GitHub.Actions.Expressions
+{
+    public class ExpressionException : Exception
+    {
+        internal ExpressionException(ISecretMasker secretMasker, String message)
+        {
+            if (secretMasker != null)
+            {
+                message = secretMasker.MaskSecrets(message);
+            }
+
+            m_message = message;
+        }
+
+        public override String Message => m_message;
+
+        private readonly String m_message;
+    }
+}