Possible null reference argument for parameter 'value' in 'string string.Join(string? separator, params string?[] value)'.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'value' in 'string string.Join(string? separator, params string?[] value)'.

Parameter 'IFormFileCollection files' is captured into the state of the enclosing type and its value is also used to initialize a field, property, or event.

Calls to methods which accept CancellationToken should use TestContext.Current.CancellationToken to allow test cancellation to be more responsive. (https://xunit.net/xunit.analyzers/rules/xUnit1051)

Calls to methods which accept CancellationToken should use TestContext.Current.CancellationToken to allow test cancellation to be more responsive. (https://xunit.net/xunit.analyzers/rules/xUnit1051)

Possible null reference argument for parameter 'value' in 'string string.Join(string? separator, params string?[] value)'.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'value' in 'string string.Join(string? separator, params string?[] value)'.