Add RawContentStream.

LibGit2Sharp/Core/Proxy.cs

@@ -85,14 +85,7 @@ public static byte[] git_blob_rawcontent(RepositorySafeHandle repo, ObjectId id,
 
         public static UnmanagedMemoryStream git_blob_rawcontent_stream(RepositorySafeHandle repo, ObjectId id, Int64 size)
         {
-            using (var obj = new ObjectSafeWrapper(id, repo))
-            {
-                IntPtr ptr = NativeMethods.git_blob_rawcontent(obj.ObjectPtr);
-                unsafe
-                {
-                    return new UnmanagedMemoryStream((byte*)ptr.ToPointer(), size);
-                }
-            }
+            return new RawContentStream(id, repo, NativeMethods.git_blob_rawcontent, size);
         }
 
         public static Int64 git_blob_rawsize(GitObjectSafeHandle obj)

LibGit2Sharp/Core/RawContentStream.cs

@@ -0,0 +1,32 @@
+using System;
+using System.IO;
+using LibGit2Sharp.Core;
+using LibGit2Sharp.Core.Handles;
+
+namespace LibGit2Sharp.Core
+{
+    internal class RawContentStream : UnmanagedMemoryStream
+    {
+        readonly ObjectSafeWrapper wrapper;
+
+        internal RawContentStream(ObjectId id, RepositorySafeHandle repo,
+            Func<GitObjectSafeHandle, IntPtr> bytePtrProvider, long length)
+            : this(new ObjectSafeWrapper(id, repo), bytePtrProvider, length)
+        {
+        }
+
+        unsafe RawContentStream(ObjectSafeWrapper wrapper,
+            Func<GitObjectSafeHandle, IntPtr> bytePtrProvider, long length)
+            : base((byte *)bytePtrProvider(wrapper.ObjectPtr).ToPointer(), length)
+        {
+            this.wrapper = wrapper;
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            base.Dispose(disposing);
+            wrapper.SafeDispose();
+        }
+    }
+}
+

LibGit2Sharp/LibGit2Sharp.csproj

@@ -216,6 +216,7 @@
     <Compile Include="TreeEntry.cs" />
     <Compile Include="TreeEntryDefinition.cs" />
     <Compile Include="VoidReference.cs" />
+    <Compile Include="Core\RawContentStream.cs" />
   </ItemGroup>
   <ItemGroup>
     <CodeAnalysisDictionary Include="CustomDictionary.xml" />