The JSON request was too large to be deserialized is a very common error because of MVC's default size for a JSON response from the Web Api. Luckily there is a very simple solution that requires a minor change in your Web.config
Inside of your Web.config under the AppSettings section you need to set a value in a key called aspnet:MaxJsonDeserializerMembers. This will tell the default deserialize process in a Web API call to allow much longer data results.
The value of 150000 can be set to valid Integer value that could probably use a little bit of trial and error to find the right value. Published on Jan 29, 2020 Tags: ASP.NET MVC and Web API Tutorial
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Increasing JSON request with aspnet:MaxJsonDeserializerMembers
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