LINQ MVC query issue while passing model to view

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HTML

MVC5

I am getting below error while calling LINQ queries to join

The model item passed into the dictionary is of type 'System.Linq.Enumerable+<JoinIterator>d__38`4[OnlineApplicationTest.Models.SubCategoryMaster,OnlineApplicationTest.Models.CategoryMaster,System.Int32,<>f__AnonymousType1`3[System.String,System.String,System.Int32]]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[OnlineApplicationTest.Models.SubCategoryMaster]'.

There is no column CategoryName in SubCategoryMaster table however it has only CategoryId is present.
I need to display CategoryName to display on view instead of Category.So i have written LINQ query to get the categoryName and passed result to view. However i am getting above error message. Any help on this will be appreciated. Thanks in advance.

What I have tried:

CategoryMaster table
CategoryId
CategoryName etc

SubCategoryMaster table
SubCategoryId
CategoryId
SubCategoryName

OnlineTestEntities2 objOnlineTest = new OnlineTestEntities2();
            
            List<SubCategoryMaster> Subcategories = objOnlineTest.SubCategoryMasters.ToList();
            List<CategoryMaster> categories = objOnlineTest.CategoryMasters.ToList();

            //var innerJoin = new List<SubCategoryMaster>();
            var innerJoin = (from s in Subcategories // outer sequence
                            join st in categories //inner sequence 
                            on s.CategoryId equals st.CategoryId // key selector 
                            select new
                            { // result selector 
                                SubCategoryName = s.SubCategoryName,
                                CategoryName = st.CategoryName,
                                SubCategoryId=s.SubCategoryId
                            }).AsEnumerable(); 
                       
            // d.AddRange(innerJoin);
            return View(innerJoin);

SubCategoryView as below

@model IEnumerable<OnlineApplicationTest.Models.SubCategoryMaster>

@{
    ViewBag.Title = "GetAllSubCategory";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>GetAllSubCategory</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.CategoryId)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.SubCategoryName)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.CategoryId)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.SubCategoryName)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.SubCategoryId }) |
            @Html.ActionLink("Details", "Details", new { id=item.SubCategoryId }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.SubCategoryId })
        </td>
    </tr>
}

</table>