reduce public api 1st round

Author: eduard-dumitru

src/UiPath.CoreIpc.Tests/NestedStreamTests.cs

@@ -358,7 +358,7 @@ public async Task ReadAsync_ValidatesArguments()
         await Assert.ThrowsAsync<ArgumentException>(() => this.stream.ReadAsync(buffer, 1, buffer.Length));
     }
 }
-public static class StreamExtensions
+internal static class StreamExtensions
 {
     /// <summary>
     /// Creates a <see cref="Stream"/> that can read no more than a given number of bytes from an underlying stream.

src/UiPath.CoreIpc/Helpers.cs

@@ -8,7 +8,7 @@
 using System.Security.Principal;
 namespace UiPath.Ipc;
 using static CancellationTokenSourcePool;
-public static class Helpers
+internal static class Helpers
 {
     public const BindingFlags InstanceFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly;
 #if NET461
@@ -167,7 +167,7 @@ private static async ValueTask WriteMessageCore(this Stream stream, RecyclableMe
     internal static Task WriteBuffer(this Stream stream, byte[] buffer, CancellationToken cancellationToken) => 
         stream.WriteAsync(buffer, 0, buffer.Length, cancellationToken);
 }
-public static class Validator
+internal static class Validator
 {
     public static void Validate(ServiceHostBuilder serviceHostBuilder)
     {
@@ -267,7 +267,7 @@ private static void CheckDerivedStream(MethodInfo method, Type type)
         }
     }
 }
-public readonly struct TimeoutHelper : IDisposable
+internal readonly struct TimeoutHelper : IDisposable
 {
     private static readonly Action<object> LinkedTokenCancelDelegate = static s => ((CancellationTokenSource)s).Cancel();
     private readonly PooledCancellationTokenSource _timeoutCancellationSource;

src/UiPath.CoreIpc/NestedStream.cs

@@ -4,7 +4,7 @@
 /// A stream that allows for reading from another stream up to a given number of bytes.
 /// https://github.com/AArnott/Nerdbank.Streams/blob/3303c541c29b979f61c86c3c2ed5c0e7372d7a55/src/Nerdbank.Streams/NestedStream.cs#L18
 /// </summary>
-public class NestedStream : Stream
+internal class NestedStream : Stream
 {
     /// <summary>
     /// The stream to read from.