fix: support hash arguments for inline partials

README.md

@@ -101,6 +101,21 @@ var result = template(data);
 */
 ```
 
+Partials, including inline partials declared with `{{#*inline}}`, accept hash arguments at the call site. The hash values are merged into the partial's context alongside any properties inherited from the calling context:
+
+```c#
+string source =
+@"{{#*inline ""user""}}<strong>{{name}}</strong>{{/inline}}{{> user name=""Karen""}}";
+
+var template = Handlebars.Compile(source);
+
+var result = template(null);
+
+/* Would render:
+<strong>Karen</strong>
+*/
+```
+
 ### Registering Helpers
 
 ```c#

source/Handlebars.Test/InlinePartialTests.cs

@@ -243,6 +243,29 @@ public void BasicInlinePartialWithIncompleteChildContextDoesNotFallback()
             Assert.Equal("Hello, Marc !", result);
         }
 
+        [Fact]
+        public void InlinePartialDefinitionWithExtraArgumentDoesNotThrow()
+        {
+            // Regression test for https://github.com/Handlebars-Net/Handlebars.Net/issues/560
+            string source = "{{#*inline \"my_partial\" arg}}{{arg}}{{/inline}}{{>my_partial}}";
+
+            var template = Handlebars.Compile(source);
+            var result = template(null);
+
+            Assert.Equal(string.Empty, result);
+        }
+
+        [Fact]
+        public void InlinePartialDefinitionWithHashArgumentDoesNotThrow()
+        {
+            string source = "{{#*inline \"my_partial\" arg=5}}{{arg}}{{/inline}}{{>my_partial}}";
+
+            var template = Handlebars.Compile(source);
+            var result = template(null);
+
+            Assert.Equal(string.Empty, result);
+        }
+
         [Fact]
         public void BasicBlockInlinePartial()
         {

source/Handlebars/Decorators/InlineBlockDecoratorDescriptor.cs

@@ -7,9 +7,9 @@ internal sealed class InlineBlockDecoratorDescriptor : IDecoratorDescriptor<Bloc
     {
         public TemplateDelegate Invoke(in TemplateDelegate function, in BlockDecoratorOptions options, in Context context, in Arguments arguments)
         {
-            if (arguments.Length != 1)
+            if (arguments.Length == 0)
             {
-                throw new HandlebarsRuntimeException("{{*inline}} helper must have exactly one argument");
+                throw new HandlebarsRuntimeException("{{*inline}} helper must have at least one argument");
             }
 
             var bindingContext = options.Frame;