An expression is a sequence of operators and operands that specify some sort of computation. The operators indicate an operation to be applied to one or two operands. For example, the operators + and - indicate adding and subtracting operands.
For example, the operator + and- indicate adding and subtracting one object from another, respectively. Listing 22 is a simple example of operators and operands.
Listing below shows - The relationship between operators and operands
static void Main()