diff --git a/src/Microsoft.DotNet.Cli.Utils/RuntimeConfig.cs b/src/Microsoft.DotNet.Cli.Utils/RuntimeConfig.cs
index 5b0c8fcc5..61691e4a8 100644
--- a/src/Microsoft.DotNet.Cli.Utils/RuntimeConfig.cs
+++ b/src/Microsoft.DotNet.Cli.Utils/RuntimeConfig.cs
@@ -1,8 +1,9 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. 
 // Licensed under the MIT license. See LICENSE file in the project root for full license information. 
- 
+
+using Newtonsoft.Json;
 using Newtonsoft.Json.Linq; 
-using System.IO; 
+using System.IO;
  
 namespace Microsoft.DotNet.Cli.Utils
 { 
@@ -12,12 +13,16 @@ namespace Microsoft.DotNet.Cli.Utils
         public RuntimeConfigFramework Framework { get; } 
  
         public RuntimeConfig(string runtimeConfigPath) 
-        { 
-            var runtimeConfigJson = OpenRuntimeConfig(runtimeConfigPath); 
- 
-            Framework = ParseFramework(runtimeConfigJson); 
- 
-            IsPortable = Framework != null; 
+        {
+            JObject runtimeConfigJson;
+            using (var streamReader = new StreamReader(new FileStream(runtimeConfigPath, FileMode.Open)))
+            {
+                runtimeConfigJson = OpenRuntimeConfig(streamReader);
+            }
+
+            Framework = ParseFramework(runtimeConfigJson);
+
+            IsPortable = Framework != null;
         } 
  
         public static bool IsApplicationPortable(string entryAssemblyPath) 
@@ -31,9 +36,11 @@ namespace Microsoft.DotNet.Cli.Utils
             return false; 
         } 
  
-        private JObject OpenRuntimeConfig(string runtimeConfigPath) 
-        { 
-            return JObject.Parse(File.ReadAllText(runtimeConfigPath)); 
+        private JObject OpenRuntimeConfig(StreamReader streamReader) 
+        {
+            var reader = new JsonTextReader(streamReader);
+
+            return JObject.Load(reader);
         } 
  
         private RuntimeConfigFramework ParseFramework(JObject runtimeConfigRoot) 
diff --git a/src/dotnet/commands/dotnet-add/dotnet-add-package/AddPackageParser.cs b/src/dotnet/commands/dotnet-add/dotnet-add-package/AddPackageParser.cs
index 70687e8d2..5ee3fd10c 100644
--- a/src/dotnet/commands/dotnet-add/dotnet-add-package/AddPackageParser.cs
+++ b/src/dotnet/commands/dotnet-add/dotnet-add-package/AddPackageParser.cs
@@ -3,10 +3,12 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Net.Http;
 using System.Threading;
 using Microsoft.DotNet.Cli.CommandLine;
+using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using LocalizableStrings = Microsoft.DotNet.Tools.Add.PackageReference.LocalizableStrings;
 
@@ -52,7 +54,7 @@ namespace Microsoft.DotNet.Cli
         {
             var httpClient = new HttpClient();
 
-            string result;
+            Stream result;
 
             try
             {
@@ -60,14 +62,18 @@ namespace Microsoft.DotNet.Cli
                 var response = httpClient.GetAsync($"https://api-v2v3search-0.nuget.org/query?q={match}&skip=0&take=100&prerelease=true", cancellation.Token)
                                          .Result;
 
-                result = response.Content.ReadAsStringAsync().Result;
+                result = response.Content.ReadAsStreamAsync().Result;
             }
             catch (Exception)
             {
                 yield break;
             }
 
-            var json = JObject.Parse(result);
+            JObject json;
+            using (var reader = new JsonTextReader(new StreamReader(result)))
+            {
+                json = JObject.Load(reader);
+            }
 
             foreach (var id in json["data"])
             {