Dereference of a possibly null reference.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'newContent' in 'void ToolbarToggleButton.UpdateContent(object newContent)'.

Provide an explicit argument for optional parameter 'equivalenceKey', which is non-null and unique for each kind of code action created by this fixer

This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)

This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)

This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)

This API will not be generated. Do not generate GetLastError. Call Marshal.GetLastWin32Error() instead. Learn more from https://docs.microsoft.com/dotnet/api/system.runtime.interopservices.marshal.getlastwin32error

Method, type or constant "EXPLICIT_ACCESS" not found. Did you mean or "EXPLICIT_ACCESS_A" or "EXPLICIT_ACCESS_W"?