Checks if overridden parameter is modifiable. 
Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2016 
Syntax
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Parameters
- paramId
- Type: Autodesk.Revit.DBElementId
 Overridden parameter id
Return Value
True if the parameter is modifiable, false if the parameter is readonly.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentException | paramId has no override | 
| Autodesk.Revit.ExceptionsArgumentNullException | A non-optional argument was null |