Make sure references are readable multiple times

Author: Alxandr

src/Microsoft.AspNet.Mvc.Razor/Precompilation/RazorPreCompiler.cs

@@ -158,8 +158,9 @@ protected virtual RazorFileInfoCollection GeneratePrecompiledAssembly(
             else
             {
                 assemblyStream.Position = 0;
+                var assemblyBytes = assemblyStream.ToArray();
                 var assemblyResource = new ResourceDescription(assemblyResourceName,
-                                                               () => assemblyStream,
+                                                               () => new MemoryStream(assemblyBytes),
                                                                isPublic: true);
                 CompileContext.Resources.Add(assemblyResource);
 
@@ -168,9 +169,10 @@ protected virtual RazorFileInfoCollection GeneratePrecompiledAssembly(
                 {
                     symbolsResourceName = resourcePrefix + ".pdb";
                     pdbStream.Position = 0;
+                    var pdbBytes = pdbStream.ToArray();
 
                     var pdbResource = new ResourceDescription(symbolsResourceName,
-                                                              () => pdbStream,
+                                                              () => new MemoryStream(pdbBytes),
                                                               isPublic: true);
 
                     CompileContext.Resources.Add(pdbResource);