c# I need to find out how to loop through an array of strings, then for each array in the string use the Append () function of the String Builder to append the first letter of each string to the stringbuilder instance. Finally I have to return the stringbuilder instance from this function. Can you offer some assistance as I am currently stuck. Thank you very much:

StringBuilder Q = new StringBuilder (5);

for (int i = 1; i < Q.Length; i++)

{

}