C # Why does & #39; + & #39; + a short convert to 44,

C # Why does '+ a short convert to 44,

I have a line of code that looks like this:

MyObject.PhoneNumber = '+' + ThePhonePrefix + TheBizNumber;

Basically, I'm creating a phone number in E164 format and then I assign that string to a string property of an object. thePhonePrefix is a short that holds the international phone prefix and TheBizNumber is a string that holds the phone number digits.

Why didn't the compiler bug when I was concatenating a short in the string in the first place? And then why does '+ 1 equal 44 ?? This was a pretty hard bug to track because there was no compile error and 44 is the phone prefix for the UK so everything "looked" like it was working because the client-side code just saw a UK number. why 44?

Thanks.

Answer:

Why didn't the compiler bug when I was concatenating a short in the string in the first place?

String concatenation using+Sign internally cballsstring.Concat, Which internally CILSToStringOn each parameter. Hence no error.

Why does '+ 1

You are doing character/numeric arithmetic.43Being value+And short/int1Is 44.

Because of operator + associativity from left to right it is first character/numeric addition and then string concatenation.

So it is like:

MyObject.PhoneNumber = ('+' + ThePhonePrefix) + TheBizNumber;

You can use"+"To mark it as a string or explicitly callString.ConcatLike:

var result = string.Concat('+', ThePhonePrefix, TheBizNumber);

Web: http://stackoverflow.com/questions/29397495/why-does-a-short-convert-to-44