IEnumerable<int>GenerateFibonacci(int n)
{
if(n >=1)yieldreturn1;
int a =1, b =0;
for(int i =2; i <= n;++i)
int t = b;
b = a;
a += t;
yieldreturn a;
}
IEnumerable<int>GenerateFibonacci(int n)
{
if(n >=1)yieldreturn1;
int a =1, b =0;
for(int i =2; i <= n;++i)
{
int t = b;
b = a;
a += t;
yieldreturn a;
}
}