This post shows you how to fix 'error CS1963: An expression tree may not contain a dynamic operation' in ASP.NET or ASP.NET Core MVC.
At the top of your View
You should define a @model variable
For Example
@model ERegist.Models.EmployeeViewModel
Don't write
@Model ERegist.Models.EmployeeViewModel
Next, You can write your expressions as shown below
@Html.EditorFor(m => m.FullName, ...
Don't write
@Html.EditorFor(m => Model.FullName, ...
I hope so you can solve the problem 'error CS1963: An expression tree may not contain a dynamic operation' when rebuild your asp.net or asp.net core mvc project in visual studio.