C# 0 The Complete Reference

float

 or 

double

 to 

decimal

, and it is not possible to mix 

ulong

 with any signed integer type. 

To mix these types requires the use of an explicit cast.

Second, pay special attention to the last rule. It states that if none of the preceding rules 

applies, then all other operands are promoted to 

int

. Therefore, in an expression, all 

char

,

sbyte

,

byte

,

ushort

, and 

short

 values are promoted to 

int

 for the purposes of calculation. 

This is called 

integer promotion.

 It also means that the outcome of all arithmetic operations 

will be no smaller than 

int

.

It is important to understand that type promotions only apply to the values operated 

upon when an expression is evaluated. For example, if the value of a