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Do not call SPFileVersion.Delete to delete multiple versions

When you delete multiple versions of a file, use the DeleteByID() method; do not use the Delete() method. You will experience performance problems if you delete each SPFileVersion object from an SPFileVersionVersionCollection object.

CheckId SPC050227
TypeName DoNotUseSPFileVersionDelete
Severity CriticalWarning
Type Assembly

The recommended practice is to create an array that contains the ID properties of each version and then delete each version by using the SPFileVersionCollection.DeleteByID method.

SPSite site = new SPSite("site url");
SPWeb web = site.OpenWeb();
SPList list = web.Lists["custom list name"];
SPFile file = list.RootFolder.Files[0];
SPFileVersionCollection collection = file.Versions;
ArrayList idList = new ArrayList();
foreach (SPFileVersion ver in collection)
foreach (int verID in idList)
   catch (Exception ex)

To suppress this violation in managed code add the following attribute to the method which contains the instruction (available since SPCAF version v5.2). Learn more about SuppressMessage here.

// Important: Ensure to have #define CODE_ANALYSIS at the beginning of your .cs file
[SuppressMessage("SPCAF.Rules.BestPracticesGroup", "SPC050227:DoNotUseSPFileVersionDelete", Justification = "Provide reason for suppression here")]
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