Acquires the working session.
            
Assembly: Epic.Core
Declaration Syntax
| C# | 
protected abstract WorkingSessionBase AcquireWorkingSessionReal( IPrincipal owner, string identifier )
Parameters
- owner (IPrincipal)
 - The owner. Will never be nullNothingnullptr.
 
- identifier (String)
 - The working session identifier. Will never be nullNothingnullptr or empty.
 
Return Value
            The working session.
            
Exceptions
| Exception | Condition | 
|---|---|
| InvalidOperationException | owner can not acquire 
            the IWorkingSession identified by identifier. | 
