Here is a ready made function in C# that lists all primes greater than 2 and less than 100.
protected void GetPrimes()
{
int i, j;
i = 2;
j = 100;
StringBuilder sb = new StringBuilder();
while (i < 100)
{
if ((j % i) == 0) //not a prime
{
j = j - 1;
i = 2;
continue;
}
else
{
i = i + 1;
}
if (i==j) { sb.Append(j.ToString()+ ", "); }
}
MessageBox.Show(sb.ToString());
}//end
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