Check file lock c#

public bool IsFileLocked(string filePath)
{
    try
    {
        using (File.Open(filePath, FileMode.Open)){}
    }
    catch (IOException e)
    {
        var errorCode = Marshal.GetHRForException(e) & ((1 << 16) - 1);
        return errorCode == 32 || errorCode == 33;
    }
    return false;
}

Source: stackoverflow.com

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