C#.Net

The s in sbyte stands for the signed values. Sign means the minus sign or the positive sign, to indicate whether the value is a negative or a positive. A byte can have 256 values, starting from 0-127 (because on the other negative side it would have 128 other values). 

You can use the sbyte when you're going to work with values that range from -128 and upto 127 only. Such as a classroom's students' data etc. 

C#'s sbyte type is equivalent to Visual C++'s char type which, by default, is a single byte type with a range of -128 to 127.

Its main use is therefore when interoperating with unmanaged code.

Otherwise you'd probably prefer to use the byte type (range of 0 to 255) in those cases where a small numeric type is needed for manipulating binary files or images, converting between different encodings etc.

Hi...

https://msdn.microsoft.com/en-us/library/d86he86x.aspx

--

As far as my knowledge goes, we don't use sbyte datatype in real life applications.

Reason - In real life application, the records are in lacs....

Real time i didnt get

But understanding concept of this go here
http://www.dotnetperls.com/sbyte