Throw for trackAllCaptures

src/Microsoft.AspNetCore.Rewrite/Internal/IISUrlRewrite/UrlRewriteFileParser.cs

@@ -110,6 +110,10 @@ namespace Microsoft.AspNetCore.Rewrite.Internal.IISUrlRewrite
 
             var grouping = ParseEnum(conditions, RewriteTags.LogicalGrouping, LogicalGrouping.MatchAll);
             var trackAllCaptures = ParseBool(conditions, RewriteTags.TrackAllCaptures, defaultValue: false);
+            if (trackAllCaptures)
+            {
+                throw new NotSupportedException("Support for trackAllCaptures has not been implemented yet");
+            }
             builder.AddUrlConditions(grouping, trackAllCaptures);
 
             foreach (var cond in conditions.Elements(RewriteTags.Add))

test/Microsoft.AspNetCore.Rewrite.Tests/IISUrlRewrite/FormatExceptionHandlingTests.cs

@@ -264,5 +264,26 @@ namespace Microsoft.AspNetCore.Rewrite.Tests.UrlRewrite
             var ex = Assert.Throws<FormatException>(() => new UrlRewriteFileParser().Parse(new StringReader(input)));
             Assert.Equal(expected, ex.Message);
         }
+
+        [Theory]
+        [InlineData(
+@"<rewrite>
+    <rules>
+        <rule name=""Remove trailing slash"">
+            <match url = ""(.*)/$""/>
+            <conditions trackAllCaptures=""true"">
+                <add input=""{REQUEST_FILENAME}""/>
+            </conditions>
+            <action type=""Redirect"" url =""{R:1}"" />
+        </rule>
+    </rules>
+</rewrite>",
+    "Support for trackAllCaptures has not been implemented yet")]
+        public void ThrowNotSupportedExceptionWithCorrectMessage(string input, string expected)
+        {
+            // Arrange, Act, Assert
+            var ex = Assert.Throws<NotSupportedException>(() => new UrlRewriteFileParser().Parse(new StringReader(input)));
+            Assert.Equal(expected, ex.Message);
+        }
     }
 }