A little help with strings in c#

Question

i can only print the numbers of characters and i was wondering how can i print words that start with a specific letter ? i want to print the words hi and how.

string str = "hi how are you?";
int count = 0;
foreach(char letter in str)
{
if (letter == 'h')
{
count++;
}

}
Console.WriteLine("the number of characters of h is:{0}", count);
Console.ReadLine();

Answer 1

split with space,
loop over the array,
if the first character is h,
print the item