Answer / pavan kumar

"default" is a keyword which can be used in two ways
1)In switch as default label
2)In generics as default paramenter.

same as "using" key word this also used in two ways
1)For implementing the namespace into current class
2)Used to check properly dispose of object using the
IDisposable interface

Answer / ravi

"default" ensures the correct initialisation takes place
and "Using" ensures the disposal of object.

Answer / kamil

If expression does not match any constant-expression, control is transferred to
the statement(s) that follow the optional default label. If there is no default
label, control is transferred outside the switch.

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