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2 changes: 1 addition & 1 deletion xml/System.Runtime.InteropServices/DllImportResolver.xml
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The runtime does not do any lifetime management around the handle returned by a <xref:System.Runtime.InteropServices.DllImportResolver>. It is left to the implementation and consuming code to keep the library loaded for as long as necessary and free it if/when desired.

The resolver delegate is called everytime when a PInvoke call is done. It is fine to cache the handle, as long as the consuming code does not call <xref:System.Runtime.InteropServices.NativeLibrary.Free>.
The resolver is typically called once for each PInvoke entry point. To improve performance, the implementation of the resolver can cache the `libraryName` to handle mapping, as long as the library isn't unloaded via <xref:System.Runtime.InteropServices.NativeLibrary.Free(System.IntPtr)>.

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