Multiple string null and empty check

[aliajboy]

It is not a bug. It is a suggestion or feature request

I want to use IsNullOrEmpty() here:
if (!string.IsNullOrEmpty(FirstName) && !string.IsNullOrEmpty(LastName) && !string.IsNullOrEmpty(Mobile))
It is not nice to do like this.

It would be nice to have something like IsNullOrEmpty(string,string,string,string...)
something like Path.Combine(). As you know it accepts some string and make the path. so, we could have 1-5 string in IsNullOrEmpty method, too.

thanks

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[KalleOlaviNiemitalo]

Seems easy enough to implement in the application:

public class C {
    public static bool IsAnyNullOrEmpty(params string?[] strings) {
        foreach (string? s in strings) {
            if (string.IsNullOrEmpty(s)) {
                return true;
            }
        }
        
        return false;
    }
}

This costs a string[] allocation for each call, though. dotnet/csharplang#7700 would allow params ReadOnlySpan<string?> strings to fix that. In addition, overloads could be added for a small number of strings.

I don't remember ever needing that kind of multiple IsNullOrEmpty check in an application. If it is for detecting invalid inputs, then the error message would typically explain which of the strings is invalid, like in ArgumentException.ThrowIfNullOrEmpty. If the strings are in properties rather than parameters, then OptionsValidatorAttribute may be useful.

[aliajboy]

I know we have different approaches for this. but as a suggestion, it would be nice to have such feature in future.
thanks

[HaloFour]

This is an API request, belongs in https://github.com/dotnet/runtime

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