While working with XlsIO on 64 bit mode "Unable to load DLL iprop.dll" error is raised. Essential XlsIO requires redistributable Iprop.dll to be installed on 64 bit windows machines.

This can be resolved in two ways:

Here is the link to find this dll:

This issue with windows api dependency can be ignored by using our new compound files[.xls] storage that is implemented with fully managed code. This can be enabled by setting UseNativeStorage of IApplication as false.

Here is the code snippet: