Dereference of a possibly null reference.

This call site is reachable on all platforms. 'Image.Save(Stream, ImageFormat)' is only supported on: 'windows'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Image.RawFormat' is only supported on: 'windows'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Image.FromFile(string)' is only supported on: 'windows'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

Unreachable code detected

The field '_UploadFilesFormDialog._uploading' is assigned but its value is never used

Dereference of a possibly null reference.

This call site is reachable on all platforms. 'Image.Save(Stream, ImageFormat)' is only supported on: 'windows'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Image.RawFormat' is only supported on: 'windows'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)