#20397: Exceptions are not used for flow control anymore in some storage services

Work Item: 20397

Signed-off-by: Zoltán Lehóczky <lehoczky_zoltan@pyrocenter.hu>

src/Orchard.Web/Modules/Orchard.Azure/Services/FileSystems/Media/AzureBlobStorageProvider.cs

@@ -23,6 +23,10 @@ namespace Orchard.Azure.Services.FileSystems.Media {
 
         public bool TrySaveStream(string path, Stream inputStream) {
             try {
+                if (FileExists(path)) {
+                    return false;
+                }
+
                 SaveStream(path, inputStream);
             }
             catch {

src/Orchard/FileSystems/Media/FileSystemStorageProvider.cs

@@ -298,6 +298,10 @@ namespace Orchard.FileSystems.Media {
         /// <returns>True if success; False otherwise.</returns>
         public bool TrySaveStream(string path, Stream inputStream) {
             try {
+                if (FileExists(path)) {
+                    return false;
+                }
+
                 SaveStream(path, inputStream);
             }
             catch {