Replace the words with 'ed' with 'ing'

[amarantha]

Replace the end of all words with the sentence ed ♪ ing♪ How do you find those words in the line?

[Nykeriab]

If, in the words, the last two letters 'ed' should be replaced by 'ing'.

If you're right in the forehead, you can.

public string[] ReplaceArrayWords(string[] array, string first, string last){
List<string> result = new List<string>();
foreach(string word in array){
    if(word.Substring(word.length-first.length,first.length).Equals(first))
        result.Add(word.Substring(0,word.length-first.length)+last);
    else
        result.Add(word);
}

return result.ToArray();

}

c Framework 4.5+ Alexander Petrov)

public string[] ReplaceArrayWords(string[] array, string first, string last){

List<string> result = new List<string>();

foreach(string word in array){
    if(word.EndsWith(first))
        result.Add(word.Substring(0,word.length-first.length)+last);
    else
        result.Add(word);
}

return result.ToArray();

}

later:

string[] newArray = ReplaceArrayWords(array,"ed","ing");