Tests whether the supplied Frame object may be used to define a Revit curve or surface. In order to satisfy the requirements the Frame must be orthonormal and its origin is expected to lie within the Revit design limits  IsWithinLengthLimits(XYZ)  . 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 17.0.0.0 (17.0.1090.0) 
  Since:  2017 
Syntax
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Parameters
- frameOfReference
-  Type:  Autodesk.Revit.DB Frame  
 Frame to be validated.
Return Value
True if this Frame may be used as a local frame of reference, false otherwise.Remarks
 Certain Revit curve and surface types are defined using a local frame of reference. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |