How to check if the year is Leap Year or not in C#

public int CheckLeapYear(int intyear)
{
if (intyear % 4 == 0 && intyear % 100 != 0 || intyear % 400 == 0)
return 1; // It is a leap year
else
return 0; // Not a leap year
}

int nYear = 2005;

bool bResult = DateTime.IsLeapYear(nYear);

if(bResult.Equals(true))

{

    // Its Leap Year

}

else

{

   // Its not a Leap Year

}