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The variable 'a' is assigned but its value is never used

Avoid unsealed attributes (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1813)

Avoid unsealed attributes (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1813)

Avoid unsealed attributes (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1813)

Avoid unsealed attributes (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1813)

Add a public read-only property accessor for positional argument tableName of Attribute TableAttribute (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1019)

Avoid unsealed attributes (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1813)

Provide an overridable implementation of Dispose(bool) on 'AppDb' or mark the type as sealed. A call to Dispose(false) should only clean up native resources. A call to Dispose(true) should clean up both managed and native resources. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1063)

Add a public read-only property accessor for positional argument iseditable of Attribute EditableAttribute (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1019)