// ws is an object variable of worksheet
// systype is a string variable

Range r = (Range)ws.Cells[2, 2];
systype = r.Value2.ToString();

how can I combine these two lines into one single line ?
Please help ....

((Range)ws.Cells[2, 2]).Value2.ToString();

ToString() sometimes lead to null reference exception , try to avoid using it.

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