Flag indicating whether elements of this material behave isotropically or orthotropically. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2013 
Syntax
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Remarks
 Applies to concrete, Metal, and generic structural assets. If the behavior is set to Isotropic, then the y and z components of Young modulus, Poisson modulus, shear modulus and thermal expansion coefficient will be changed to the value the same as their x components. 
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentOutOfRangeException | When setting this property: A value passed for an enumeration argument is not a member of that enumeration |