Fixed null reference issue in minio expiration actions

aspnet-core/modules/oss-management/LINGYUN.Abp.OssManagement.Minio/LINGYUN/Abp/OssManagement/Minio/MinioOssContainer.cs

@@ -270,14 +270,15 @@ public class MinioOssContainer : OssContainerBase, IOssObjectExpireor
 
             await foreach (var item in expiredObjects)
             {
-                var lifecycleRule = new LifecycleRule
+                var lifecycleConfiguration = new LifecycleConfiguration(new List<LifecycleRule>
                 {
-                    Status = LifecycleRule.LifecycleRuleStatusEnabled,
+                    new LifecycleRule
-                    ID = item.Key,
+                    {
-                    Expiration = new Expiration(Clock.Normalize(request.ExpirationTime.DateTime))
+                        ID = item.Key,
-                };
+                        Status = LifecycleRule.LifecycleRuleStatusEnabled,
-                var lifecycleConfiguration = new LifecycleConfiguration();
+                        Expiration = new Expiration(Clock.Normalize(request.ExpirationTime.DateTime))
-                lifecycleConfiguration.Rules.Add(lifecycleRule);
+                    }
+                });
 
                 var lifecycleArgs = new SetBucketLifecycleArgs()
                     .WithBucket(bucket)