System.Type.GetEnumValues C# (CSharp) Method

        public Array GetEnumValues()
        {
            return Enum.GetEnumValues(this);
        }

 public EnumConfiguration(Type enumType)
 {
     _signed = IsSignedEnum(enumType);
     _flags = IsFlagsEnum(enumType);
     _names = enumType.GetEnumNames();
     var members = enumType.GetMembers(BindingFlags.Static | BindingFlags.Public);
     Debug.Assert(members.Length == _names.Length);
     for (int i = 0; i < members.Length; i++)
     {
         var a = members[i].GetCustomAttributes<PersistedNameAttribute>().FirstOrDefault();
         if (a != null) _names[i] = a.Name;
     }
     var undertype = enumType.GetEnumUnderlyingType();
     var enumValues = enumType.GetEnumValues();
     IEnumerable<ulong> enumValuesUlongs;
     if (undertype == typeof(int)) enumValuesUlongs = enumValues.Cast<int>().Select(i => (ulong)i);
     else if (undertype == typeof(uint)) enumValuesUlongs = enumValues.Cast<uint>().Select(i => (ulong)i);
     else if (undertype == typeof(sbyte)) enumValuesUlongs = enumValues.Cast<sbyte>().Select(i => (ulong)i);
     else if (undertype == typeof(byte)) enumValuesUlongs = enumValues.Cast<byte>().Select(i => (ulong)i);
     else if (undertype == typeof(short)) enumValuesUlongs = enumValues.Cast<short>().Select(i => (ulong)i);
     else if (undertype == typeof(ushort)) enumValuesUlongs = enumValues.Cast<ushort>().Select(i => (ulong)i);
     else if (undertype == typeof(long)) enumValuesUlongs = enumValues.Cast<long>().Select(i => (ulong)i);
     else enumValuesUlongs = enumValues.Cast<ulong>();
     _values = enumValuesUlongs.ToArray();
 }