Complete the BLOB Storing document.

docs/en/Blob-Storing.md

@@ -289,7 +289,10 @@ Configure<AbpBlobStoringOptions>(options =>
 
 ## Extending the BLOB Storing System
 
-TODO
+Most of the times, you won't need to customize the BLOB storage system except [creating a custom BLOB storage provider](Blob-Storing-Custom-Provider.md). However, you can replace any service introduced above (via [dependency injection](Dependency-Injection.md)), if you need. Here, some other services not mentioned above, but you may want to know:
+
+* `IBlobProviderSelector` is used to get a `IBlobProvider` instance by a container name. Default implementation (`DefaultBlobProviderSelector`) selects the provider using the configuration.
+* `IBlobContainerConfigurationProvider` is used to get the `BlobContainerConfiguration` for a given container name. Default implementation (`DefaultBlobContainerConfigurationProvider`) gets the configuration from the `AbpBlobStoringOptions` explained above.
 
 ## See Also
 

docs/en/docs-nav.json

@@ -179,6 +179,36 @@
           "text": "Object to object mapping",
           "path": "Object-To-Object-Mapping.md"
         },
+        {
+          "text": "BLOB Storing",
+          "items": [
+            {
+              "text": "BLOB Storing System",
+              "path": "Blob-Storing.md"
+            },
+            {
+              "text": "Storage Providers",
+              "items": [
+                {
+                  "text": "File System Provider",
+                  "path": "Blob-Storing-File-System.md"
+                },
+                {
+                  "text": "Database Provider",
+                  "path": "Blob-Storing-Database.md"
+                },
+                {
+                  "text": "Azure Provider",
+                  "path": "Blob-Storing-Azure.md"
+                },
+                {
+                  "text": "Create a Custom Provider",
+                  "path": "Blob-Storing-Custom-Provider.md"
+                }
+              ]
+            }            
+          ]
+        },
         {
           "text": "Text Templating",
           "path": "Text-Templating.md"

framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/IBlobContainerConfigurationProvider.cs

@@ -2,6 +2,11 @@
 {
     public interface IBlobContainerConfigurationProvider
     {
+        /// <summary>
+        /// Gets a <see cref="BlobContainerConfiguration"/> for the given container <paramref name="name"/>.
+        /// </summary>
+        /// <param name="name">The name of the container</param>
+        /// <returns>The configuration that should be used for the container</returns>
         BlobContainerConfiguration Get(string name);
     }
 }