advanced c# coding check if office products exists

Type outlookType = Type.GetTypeFromProgID("Outlook.Application");
Type excelType = Type.GetTypeFromProgID("Excel.Application");
Type powerpointType = Type.GetTypeFromProgID("Powerpoint.Application");
Type wordType = Type.GetTypeFromProgID("Word.Application");


if (outlookType == null)
{
// outlook is not installed
}
else
{
// outlook is installed
}




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