how to append strings into array in c# code example

Example 1: append an array in c#

int[] terms = new int[400];
for (int runs = 0; runs < 400; runs++)
{
    terms[runs] = value;
}

Example 2: c# how to append in array

int[] terms;

for(int runs = 0; runs < 400; runs++)
{
    terms[] = runs;
}