c# - Creating a nullable<T> extension method ,how do you do it? -

i have situation need compare nullable types.
suppose have 2 values:

int? foo=null; int? bar=4;

this not work:

if(foo>bar)

the following works not nullable restrict value types:

public static bool islessthan<t>(this t leftvalue, t rightvalue) t : struct, icomparable<t> {        return leftvalue.compareto(rightvalue) == -1; }

this works it's not generic:

public static bool islessthan(this int? leftvalue, int? rightvalue) {     return nullable.compare(leftvalue, rightvalue) == -1; }

how make generic version of islessthan?

thanks lot

try this:

public static bool islessthan<t>(this nullable<t> t, nullable<t> other) t : struct {     return nullable.compare(t, other) < 0; }

Barbera