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| ArcObjects Help for .NET developers > ArcObjects namespaces > GeoDatabaseExtensions > ESRI.ArcGIS.GeoDatabaseExtensions > Interfaces > IL > ILasHeaderInfo Interface > ILasHeaderInfo.FileSourceID Property (ArcObjects .NET 10.5 SDK) | 
The LAS file's source ID.
[Visual Basic .NET] Public ReadOnly Property FileSourceID As Integer
[C#] public int FileSourceID {get;}
[C++]
HRESULT get_FileSourceID(
  long* pID
);
[C++]
Parameters pID [out, retval] pID is a parameter of type long