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The following table shows the diagnostic IDs for System.Text.Json source-generation analyzers in .NET 8 and later versions.
| Diagnostic ID | Description |
|---|---|
SYSLIB1220 |
JsonSourceGenerator encountered a JsonConverterAttribute with an invalid type argument. |
SYSLIB1221 |
JsonSourceGenerator does not support this C# language version. |
SYSLIB1222 |
Constructor annotated with JsonConstructorAttribute is inaccessible. |
SYSLIB1223 |
Attributes deriving from JsonConverterAttribute are not supported by the source generator. |
SYSLIB1224 |
Types annotated with JsonSerializableAttribute must be classes deriving from JsonSerializerContext. |
SYSLIB1225 |
Type includes ref like property, field, or constructor parameter. |
SYSLIB1226 |
Reserved for System.Text.Json.SourceGeneration. |
SYSLIB1227 |
Reserved for System.Text.Json.SourceGeneration. |
SYSLIB1228 |
Reserved for System.Text.Json.SourceGeneration. |
SYSLIB1229 |
Reserved for System.Text.Json.SourceGeneration. |
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