Automatically rename a file if it already exists in Windows way

Question

My C# code is generating several text files based on input and saving those in a folder. Also, I am assuming that the name of the text file will be same as input.(The input

Answer 1

You can declare a Dictionary to keep the number of times each root file name was saved. After that, on your Save method, just increase the counter and append it to the base file name:

var key = fileName.ToLower();
string newFileName;
if(!_dictionary.ContainsKey(key))
{
    newFileName = fileName;
    _dictionary.Add(key,0);
}
else
{
    _dictionary[key]++;
   newFileName = String.Format("{0}({1})", fileName, _dictionary[key])
}

This way, you'll have a counter for each distinct file name: AAA(1), AAA(2); BBB(1)...