Cannot convert null literal to non-nullable reference type.

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Dereference of a possibly null reference.

Missing XML comment for publicly visible type or member 'AssistantInputParameter.DefaultValue'

Missing XML comment for publicly visible type or member 'AssistantPromptExecutionSettings'

Change 'StopSequences' to be read-only by removing the property setter (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2227)

Change the event 'OnMessageReceived' to replace the type 'System.EventHandler<Microsoft.SemanticKernel.ChatMessageContent>?' with a generic EventHandler, for example EventHandler<T>, where T is a valid EventArgs (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1003)

In externally visible method 'void KernelExtensions.ImportPluginFromAssistant(Kernel kernel, IAssistant assistant)', validate parameter 'kernel' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)

In externally visible method 'AssistantBuilder AssistantBuilder.WithKernelToClone(Kernel kernelToClone)', validate parameter 'kernelToClone' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)