System.IO.IOException: 'The process cannot access the file '@.txt' because it is being used by another process.'

Question

I am new to programming and I have a question. If I have two functions, one creates a text file and writes into it, while the other opens the same text file and reads from i

Answer 1

Create a file and then close it. After can save data into that file. I did as below.

if (!File.Exists(filePath))
{
    File.Create(filePath).Close();
}
File.WriteAllText(filePath, saveDataString)