C # convert ASCII characters such as VB.net line breaks

Under normal circumstances, most people may only consider simple representations such as \ r \ n \ t,
However, when using COM components such as Excel, you must use a CHR (INT) similar to VB. NET to convert it to the ASCII character set.
C # similar usage is also very simple:
For example, \ n is (char) 10.
But it can be used normally only after being converted to the string type: (char) 10). tostring () // once found this bug for one night .. Khan
For example, in C #, call the Excel search replacement method:

// Sheet is an Excel. Worksheet
Sheet. cells. Replace ((( Char ) S). tostring (), "   " , Excel. xllookat. xlpart, Excel. xlsearchorder. xlbyrows, type. Missing );