System.CodeDom.Compiler.CodeDomProvider.IsValidIdentifier C# (CSharp) Method

        public virtual bool IsValidIdentifier(string value) =>
            CreateGeneratorHelper().IsValidIdentifier(value);

 internal static string GenerateIdName(string name, CodeDomProvider codeProvider, bool useSuffix, int additionalCharsToTruncate)
 {
     if (!useSuffix)
     {
         name = GetBackwardCompatibleIdentifier(name, codeProvider);
     }
     if (codeProvider.IsValidIdentifier(name))
     {
         return name;
     }
     string str = name.Replace(' ', '_');
     if (!codeProvider.IsValidIdentifier(str))
     {
         if (!useSuffix)
         {
             str = "_" + str;
         }
         for (int i = 0; i < str.Length; i++)
         {
             UnicodeCategory unicodeCategory = char.GetUnicodeCategory(str[i]);
             if (((((unicodeCategory != UnicodeCategory.UppercaseLetter) && (UnicodeCategory.LowercaseLetter != unicodeCategory)) && ((UnicodeCategory.TitlecaseLetter != unicodeCategory) && (UnicodeCategory.ModifierLetter != unicodeCategory))) && (((UnicodeCategory.OtherLetter != unicodeCategory) && (UnicodeCategory.NonSpacingMark != unicodeCategory)) && ((UnicodeCategory.SpacingCombiningMark != unicodeCategory) && (UnicodeCategory.DecimalDigitNumber != unicodeCategory)))) && (UnicodeCategory.ConnectorPunctuation != unicodeCategory))
             {
                 str = str.Replace(str[i], '_');
             }
         }
     }
     int num2 = 0;
     string str2 = str;
     while (!codeProvider.IsValidIdentifier(str) && (num2 < 200))
     {
         num2++;
         str = "_" + str;
     }
     if (num2 >= 200)
     {
         str = str2;
         while (!codeProvider.IsValidIdentifier(str) && (str.Length > 0))
         {
             str = str.Remove(str.Length - 1);
         }
         if (str.Length == 0)
         {
             return str2;
         }
         if (((additionalCharsToTruncate > 0) && (str.Length > additionalCharsToTruncate)) && codeProvider.IsValidIdentifier(str.Remove(str.Length - additionalCharsToTruncate)))
         {
             str = str.Remove(str.Length - additionalCharsToTruncate);
         }
     }
     return str;
 }