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Fix ApplicationLanguages.PrimaryLanguageOverride to allow clearing with empty string #26

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Fix ApplicationLanguages.PrimaryLanguageOverride to allow clearing with empty string #26

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3 changes: 2 additions & 1 deletion dev/MRTCore/mrt/Microsoft.Windows.ApplicationModel.Resources/src/ApplicationLanguages.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,8 @@ namespace winrt::Microsoft::Windows::Globalization::implementation

void ApplicationLanguages::PrimaryLanguageOverride(hstring const& language)
{
bool isValidLanguageTag = IsWellFormedTag(language.c_str());
// Allow empty string to clear the override, otherwise validate the language tag
bool isValidLanguageTag = language.empty() || IsWellFormedTag(language.c_str());

THROW_HR_IF_MSG(E_INVALIDARG, !isValidLanguageTag, "The parameter is incorrect");

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