Accelerated C# 2008

Notice that the obj variable in the Main method is not directly assigned before the call to

PassAsOutParam. That’s perfectly fine, since it is marked an out parameter. The PassAsOutParam

method won’t be referencing the variable unless it has already assigned it. If you were to replace the

two occurrences of out with ref in the previous code, you would see a compiler error similar to the

following:

error CS0165: Use of unassigned local variable 'obj'

param Arrays

C# makes it a snap to pass a variable list of parameters. Simply declare the last parameter in your

parameter list as an array type and precede the array type with the params keyword. Now, if the

method is invoked with a variable number of parameters, those parameters are passed to the

method ...