get_Items creates an exception of type NotImplementedException, an exception type that should not be raised in a property. If this exception instance might be raised, use a different exception type, convert this property into a method, or change this property's logic so that it no longer raises an exception. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1065)

Use primary constructor (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0290)

Use primary constructor (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0290)

Use primary constructor (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0290)

Collection initialization can be simplified (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0028)

Collection initialization can be simplified (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0028)

Collection initialization can be simplified (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0028)

Identifier 'Object' contains type name (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1720)

Properties should not return arrays (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1819)