public static sbyte ObjectToSByte(object obj, sbyte defaultVal = default)
 {
     if (obj is null)
     {
         return(defaultVal);
     }
     if (obj is sbyte myself)
     {
         return(myself);
     }
     if (obj is string str)
     {
         return(StringToSByte(str, defaultVal));
     }
     str = obj.ToString();
     if (StringSByteDeterminer.Is(str))
     {
         return(StringToSByte(str, defaultVal));
     }
     try
     {
         return(Convert.ToSByte(ObjectToDecimal(obj, defaultVal)));
     }
     catch
     {
         return(defaultVal);
     }
 }
 public static sbyte?StringToNullableSByte(string str)
 {
     if (StringSByteDeterminer.Is(str))
     {
         return(StringSByteDeterminer.To(str));
     }
     return(null);
 }
 public static bool __numericIs(string s, Type type, Action <object> action, NumberStyles?numberStyle, IFormatProvider provider) =>
 type == TypeClass.ByteClazz && StringByteDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <byte>(action)) ||
 type == TypeClass.SByteClazz && StringSByteDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <sbyte>(action)) ||
 type == TypeClass.Int16Clazz && StringShortDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <short>(action)) ||
 type == TypeClass.UInt16Clazz && StringUShortDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <ushort>(action)) ||
 type == TypeClass.Int32Clazz && StringIntDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <int>(action)) ||
 type == TypeClass.UInt32Clazz && StringUIntDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <uint>(action)) ||
 type == TypeClass.Int64Clazz && StringLongDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <long>(action)) ||
 type == TypeClass.UInt64Clazz && StringULongDeterminer.Is(s, numberStyle ?? INT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <ulong>(action)) ||
 type == TypeClass.FloatClazz && StringFloatDeterminer.Is(s, numberStyle ?? FLT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <float>(action)) ||
 type == TypeClass.DoubleClazz && StringDoubleDeterminer.Is(s, numberStyle ?? FLT_NUMBER_STYLE, provider, ValueConverter.ConvertAct <double>(action)) ||
 type == TypeClass.DecimalClazz && StringDecimalDeterminer.Is(s, numberStyle ?? DEM_NUMBER_STYLE, provider, ValueConverter.ConvertAct <decimal>(action));
 /// <summary>
 /// Is SByte
 /// </summary>
 /// <param name="str"></param>
 /// <returns></returns>
 public static bool IsSByte(this string str) => StringSByteDeterminer.Is(str);