I have a problem with code which is running under MacOS with Czech localisation. I need few block of the codes which are working with files with doubles under English localisation. I tried to use in the first block of workbook Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en"); but this setting is not propagated to the next blocks and I have to use it at the beginning of the each block. This is not useful. Is here any way how to set the localisation globally for the whole workbook?