Use ExceptionDispatchInfo in more places (#1182)

Co-authored-by: Wojciech Nagórski <wojtpl2@gmail.com>

Author: Rob-Hague

src/Renci.SshNet/KeyboardInteractiveAuthenticationMethod.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using System.Runtime.ExceptionServices;
 using System.Threading;
 
 using Renci.SshNet.Abstractions;
@@ -78,7 +79,7 @@ public override AuthenticationResult Authenticate(Session session)
 
             if (_exception != null)
             {
-                throw _exception;
+                ExceptionDispatchInfo.Capture(_exception).Throw();
             }
 
             return _authenticationResult;

src/Renci.SshNet/PasswordAuthenticationMethod.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.ExceptionServices;
 using System.Text;
 using System.Threading;
 
@@ -114,7 +115,7 @@ public override AuthenticationResult Authenticate(Session session)
 
             if (_exception != null)
             {
-                throw _exception;
+                ExceptionDispatchInfo.Capture(_exception).Throw();
             }
 
             return _authenticationResult;

src/Renci.SshNet/Sftp/SftpFileReader.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using System.Runtime.ExceptionServices;
 using System.Threading;
 
 using Renci.SshNet.Abstractions;
@@ -80,7 +81,7 @@ public byte[] Read()
 
             if (_exception is not null)
             {
-                throw _exception;
+                ExceptionDispatchInfo.Capture(_exception).Throw();
             }
 
             if (_isEndOfFileRead)
@@ -102,7 +103,7 @@ public byte[] Read()
                 // throw when exception occured in read-ahead, or the current instance is already disposed
                 if (_exception != null)
                 {
-                    throw _exception;
+                    ExceptionDispatchInfo.Capture(_exception).Throw();
                 }
 
                 var data = nextChunk.Data;

src/Renci.SshNet/SshCommand.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Globalization;
 using System.IO;
+using System.Runtime.ExceptionServices;
 using System.Text;
 using System.Threading;
 
@@ -483,7 +484,8 @@ private void WaitOnHandle(WaitHandle waitHandle)
             switch (signaledElement)
             {
                 case 0:
-                    throw _exception;
+                    ExceptionDispatchInfo.Capture(_exception).Throw();
+                    break;
                 case 1:
                     // Specified waithandle was signaled
                     break;

src/Renci.SshNet/SubsystemSession.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Globalization;
+using System.Runtime.ExceptionServices;
 using System.Threading;
 
 using Renci.SshNet.Abstractions;
@@ -241,7 +242,8 @@ public void WaitOnHandle(WaitHandle waitHandle, int millisecondsTimeout)
             switch (result)
             {
                 case 0:
-                    throw _exception;
+                    ExceptionDispatchInfo.Capture(_exception).Throw();
+                    break;
                 case 1:
                     throw new SshException("Connection was closed by the server.");
                 case 2:
@@ -286,7 +288,8 @@ public bool WaitOne(WaitHandle waitHandle, int millisecondsTimeout)
             switch (result)
             {
                 case 0:
-                    throw _exception;
+                    ExceptionDispatchInfo.Capture(_exception).Throw();
+                    return false; // unreached
                 case 1:
                     throw new SshException("Connection was closed by the server.");
                 case 2:
@@ -340,7 +343,8 @@ public int WaitAny(WaitHandle waitHandle1, WaitHandle waitHandle2, int milliseco
             switch (result)
             {
                 case 0:
-                    throw _exception;
+                    ExceptionDispatchInfo.Capture(_exception).Throw();
+                    return -1; // unreached
                 case 1:
                     throw new SshException("Connection was closed by the server.");
                 case 2:
@@ -377,7 +381,8 @@ public int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout)
             switch (result)
             {
                 case 0:
-                    throw _exception;
+                    ExceptionDispatchInfo.Capture(_exception).Throw();
+                    return -1; // unreached
                 case 1:
                     throw new SshException("Connection was closed by the server.");
                 case 2: