c# File.Exists returns true on inexistent file [duplicate]

Answer 1

When you use just the fileName, it will find in the same local where it is executing. You have to pass the full path, for sample:

if (File.Exists("C:\\temp\\file.txt"))
{
  // exists, use it
}
else
{
  // does not exists
}

Answer 2

If the method is returning true, then the file does exist.

However, you are probably not looking at the same location as the File.Exists command.

From MSDN

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory.

As you are not specifying the full path to the file, the current working directory is being used to determine if the file exists; and it likely does exist there.