soal darmorede c# ebtedaii

salam man ghablan ba vb kar mikardam ye tabeii be name instr vojood dasht ke mitoonest peida kone ye harfi ro hala ba c# kar mikonam ama nemidoonam az chi be jash estefade konam

mirbehnam1 wrote:

salam man ghablan ba vb kar mikardam ye tabeii be name instr vojood dasht ke mitoonest peida kone ye harfi ro hala ba c# kar mikonam ama nemidoonam az chi be jash estefade konam

Ex:
string big = "baba nan dad! baba ab dad";
string joda = big.Substring(0, big.IndexOf("!")); // joda = baba nan dad
// big.IndexOf = meghdar bazgashti adad (int)  ke age mokhalef -1 bashe yani on character dakhel reshte mored nazar hast
if (big.IndexOf("baba")!=-1)
{
   //Vaghti baba dar string big Bashad
}
else
{
   //Vaghti baba dar string big nabashad
}