Remove GetCultureInfoByIetfLanguageTag proxy from SafeSecurityHelper (#9733)

Author: h3xds1nz

src/Microsoft.DotNet.Wpf/src/PresentationCore/MS/internal/TextFormatting/CultureMapper.cs

@@ -58,7 +58,7 @@ public static CultureInfo GetSpecificCulture(CultureInfo runCulture)
                             try
                             {
                                 CultureInfo culture = CultureInfo.CreateSpecificCulture(cultureName);
-                                specificCulture = SafeSecurityHelper.GetCultureInfoByIetfLanguageTag(culture.IetfLanguageTag);
+                                specificCulture = CultureInfo.GetCultureInfoByIetfLanguageTag(culture.IetfLanguageTag);
                             }
                             catch (ArgumentException)
                             {

src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Markup/XmlLanguage.cs

@@ -193,7 +193,7 @@ public CultureInfo GetEquivalentCulture()
                 {
                     // Even if we previously failed to find an EquivalentCulture, we retry, if only to
                     //   capture inner exception.
-                    _equivalentCulture = SafeSecurityHelper.GetCultureInfoByIetfLanguageTag(lowerCaseTag);
+                    _equivalentCulture = CultureInfo.GetCultureInfoByIetfLanguageTag(lowerCaseTag);
                 }
                 catch (ArgumentException e)
                 {
@@ -247,7 +247,7 @@ public CultureInfo GetSpecificCulture()
                         {
                             // note that it's important that we use culture.Name, not culture.IetfLanguageTag, here
                             culture = CultureInfo.CreateSpecificCulture(culture.Name);
-                            _specificCulture = SafeSecurityHelper.GetCultureInfoByIetfLanguageTag(culture.IetfLanguageTag);
+                            _specificCulture = CultureInfo.GetCultureInfoByIetfLanguageTag(culture.IetfLanguageTag);
                         }
                         catch (ArgumentException e)
                         {
@@ -268,9 +268,7 @@ internal CultureInfo GetCompatibleCulture()
         {
             if (_compatibleCulture == null)
             {
-                CultureInfo culture = null;
-
-                if (!TryGetEquivalentCulture(out culture))
+                if (!TryGetEquivalentCulture(out CultureInfo culture))
                 {
                     string languageTag = IetfLanguageTag;
 
@@ -287,7 +285,7 @@ internal CultureInfo GetCompatibleCulture()
                         {
                             try
                             {
-                                culture = SafeSecurityHelper.GetCultureInfoByIetfLanguageTag(languageTag);
+                                culture = CultureInfo.GetCultureInfoByIetfLanguageTag(languageTag);
                             }
                             catch (ArgumentException)
                             {

src/Microsoft.DotNet.Wpf/src/Shared/MS/Internal/SafeSecurityHelper.cs

@@ -278,19 +278,6 @@ static bool IsSameKeyToken(byte[] reqKeyToken, byte[] curKeyToken)
         }
 #endif //!REACHFRAMEWORK
 
-#if PRESENTATION_CORE
-
-        /// <summary>
-        ///     This function is a wrapper for CultureInfo.GetCultureInfoByIetfLanguageTag().
-        ///     The wrapper works around a bug in that routine, which causes it to throw
-        ///     a SecurityException in Partial Trust.
-        /// </summary>
-        static internal CultureInfo GetCultureInfoByIetfLanguageTag(string languageTag)
-        {
-            return CultureInfo.GetCultureInfoByIetfLanguageTag(languageTag);
-        }
-#endif //PRESENTATIONCORE
-
         internal const string IMAGE = "image";
     }