Returns a cell's CategoryId and if no CategoryId exists for this cell, it would come from the column. Associated with the paramId to find the correct element. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Syntax
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Parameters
- nRow
 - Type: SystemInt32
 
- nCol
 - Type: SystemInt32
 
Exceptions
| Exception | Condition | 
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| Autodesk.Revit.ExceptionsArgumentException | The given row number nRow is invalid. -or- The given column number nCol is invalid. |