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Using JsonConvert.DeserializeObject to Deserialize JSON to a C# POCO Class: Problem Analysis and Solutions

JSON Deserialization C# POCO Class JsonProperty Attribute Newtonsoft.Json System.Text.Json

This article delves into common issues encountered when using JsonConvert.DeserializeObject to deserialize JSON data into C# POCO classes, particularly exceptions caused by type mismatches. Through a detailed case study of a User class deserialization, it explains the critical role of the JsonProperty attribute, compares differences between Newtonsoft.Json and System.Text.Json, and provides complete code examples and best practices. The content also covers property mapping, nested object handling, and migration considerations between the two JSON libraries, assisting developers in efficiently resolving deserialization challenges.