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Is there any way to create a ViewDataDictionary with a model and additional properties with a single line of code. I am trying to make a RenderPartial call to a strongly-typed view while assembling both the model and some extra display configuration properties without explicitly assembling the ViewDataDictionary across multiple lines. It seems like it would be possible given the RenderPartial overload taking both a model object and a ViewDataDictionary but it looks like it simply ignores the ViewDataDictionary whenever they are both populated. // FAIL: This will result in ViewData being a ViewDataDictionary // where Model = MyModelObject and there are no other parameters available. this.Html.RenderPartial("SomePartialView", MyModelObject, new ViewDataDictionary(new { SomeDisplayParameter = true })); I found someone else with the same problem , but their solution is the same multi-line concept I found: create a discrete ViewDataDictionary with the model, add the new parameter(s) and use it in the RenderPartial call. var SomeViewData = new ViewDataDictionary(MyModelObject); SomeViewData.Add("SomeDisplayParameter", true); this.Html.RenderPartial("SomePartialView", SomeViewData); I can always wrap that logic into a ChainedAdd method that returns a duplicate dictionary with the new element added but it just seems like I am missing some way of creating a ViewDataDictionary that would do this for me (and that is a bit more overhead than I was hoping for). this.Html.RenderPartial("SomePartialView", new ViewDataDictionary(MyModelObject).ChainedAdd("SomeDisplayParameter", true)); public static ViewDataDictionaryExtensions { public static ViewDataDictionar

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