The process can't access the file, because it is being used by another process [duplicate]

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Cant Access File because it is being used by another process

using (StreamWriter _SelectedFile = File.CreateText(CConstant.m_TEMPFILEPATH))
{
    _SelectedFile.WriteLine(CConstant.m_SaveF开发者_开发知识库ileDefaultDirectory);
    _SelectedFile.WriteLine(CConstant.Tempfile_ECUSelected);
    _SelectedFile.WriteLine(CConstant.Tempfile_inifile);
    _SelectedFile.WriteLine(CConstant.Tempfile_mapfile);
    _SelectedFile.Flush();
    _SelectedFile.Close();
    _SelectedFile.Dispose();
}

When running the code, the very first time when i run the code(There is no temp.txt file ) , it throws an exception "The process can't access the file, because it is being used by another process."Please suggest a solution and also what's wrong in writing the code this way?

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Cant you create FileStream with FileMode.OpenOrCreate option? rather than File?

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using (StreamWriter sw = new StreamWriter(CConstant.m_TEMPFILEPATH, true))

replace your code with the code of upper ,and test it, is also same result?