Removed name closure, fixes last part of aspnet#352

Author: khellang

src/Microsoft.AspNet.Http/FormFileCollection.cs

@@ -7,19 +7,34 @@ namespace Microsoft.AspNet.Http.Internal
 {
     public class FormFileCollection : List<IFormFile>, IFormFileCollection
     {
-        public IFormFile this[string name]
-        {
-            get { return GetFile(name); }
-        }
+        public IFormFile this[string name] => GetFile(name);
 
         public IFormFile GetFile(string name)
         {
-            return Find(file => string.Equals(name, file.Name));
+            foreach (var file in this)
+            {
+                if (string.Equals(name, file.Name))
+                {
+                    return file;
+                }
+            }
+
+            return null;
         }
 
         public IReadOnlyList<IFormFile> GetFiles(string name)
         {
-            return FindAll(file => string.Equals(name, file.Name));
+            var files = new List<IFormFile>();
+
+            foreach (var file in this)
+            {
+                if (string.Equals(name, file.Name))
+                {
+                    files.Add(file);
+                }
+            }
+
+            return files;
         }
     }
 }