Using C# pattern matching for string argument checks

WhitespacePatternMatching1.cs

// I think it would be nice to be able to use a `bool` Method Group in pattern matching statements, like
// string.IsNullOrWhitespace(). Here's an example.

public class Thing
{
    private readonly IOptions<MyOptions> _options;
    
    public Thing(IOptions<MyOptions> options)
    {
        _options = options switch
        {
            null => throw new ArgumentNullException(nameof(options)),
            { Value.Prop1: string.IsNullOrWhitespace } => throw new ArgumentNullException(nameof(options.Value.Prop1)),
            { Value.Prop2: string.IsNullOrWhitespace } => throw new ArgumentNullException(nameof(options.Value.Prop2)),
            { Value.Prop3: string.IsNullOrWhitespace } => throw new ArgumentNullException(nameof(options.Value.Prop3)),
            _ => options
        };
    }
}

WhitespacePatternMatching2.cs

// This is what I ended up with! It's more verbose than I'd like, but 🤷🏻‍♂️

#nullable enable

public class Thing
{
    private readonly IOptions<MyOptions> _options;
    
    public Thing(IOptions<MyOptions> options)
    {
        _options = options switch
        {
            { Value.Prop1: var prop }
                when string.IsNullOrWhitespace(prop) => 
                    throw new ArgumentNullException(nameof(options.Value.Prop1)),
            { Value.Prop2: var prop }
                when string.IsNullOrWhitespace(prop) => 
                    throw new ArgumentNullException(nameof(options.Value.Prop2))
            { Value.Prop3: var prop }
                when string.IsNullOrWhitespace(prop) => 
                    throw new ArgumentNullException(nameof(options.Value.Prop3))
            _ => options
        };
    }
}

#nullable restore