BCL: Encountering System.NullReferenceException when 'enumerationOptions' parameter of Directory.EnumerateFiles method is null

[hrumhurum]

Description

The following methods throw System.NullReferenceException when their enumerationOptions parameter is null:

• Directory.EnumerateFiles(String, String, EnumerationOptions)
• Directory.EnumerateDirectories(String, String, EnumerationOptions)
• Directory.EnumerateFileSystemEntries(String, String, EnumerationOptions)

Instead, they should throw System.ArgumentNullException when enumerationOptions parameter is null.

Reproduction Steps

Directory.EnumerateFiles(@"C:\", "*", (EnumerationOptions)null);

Expected behavior

• System.ArgumentNullException: Value cannot be null. (Parameter 'enumerationOptions')

Actual behavior

• System.NullReferenceException: Object reference not set to an instance of an object.

Regression?

No response

Known Workarounds

No response

Configuration

.NET SDK 9.0.203

Other information

No response

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[stephentoub]

Please feel free to submit a PR to fix it. Thanks.

[hrumhurum]

@huoyaoyuan, thank you for providing the PR, looks good to me.