Fix some build warnings.

src/NTwain/Data/TWAINH.cs

@@ -240,6 +240,7 @@ namespace NTwain.Data
     /// Set our value...
     /// </summary>
     /// <param name="a_sz"></param>
+    /// <param name="a_blMayHavePrefix"></param>
     private void SetValue(string a_sz, bool a_blMayHavePrefix)
     {
       // If we're running on a Mac, tack on the prefix 'byte'...
@@ -415,6 +416,7 @@ namespace NTwain.Data
     /// Set our value...
     /// </summary>
     /// <param name="a_sz"></param>
+    /// <param name="a_blMayHavePrefix"></param>
     private void SetValue(string a_sz, bool a_blMayHavePrefix)
     {
       // If we're running on a Mac, tack on the prefix 'byte'...
@@ -629,6 +631,7 @@ namespace NTwain.Data
     /// Set our value...
     /// </summary>
     /// <param name="a_sz"></param>
+    /// <param name="a_blMayHavePrefix"></param>
     private void SetValue(string a_sz, bool a_blMayHavePrefix)
     {
       // If we're running on a Mac, tack on the prefix 'byte'...
@@ -923,6 +926,7 @@ namespace NTwain.Data
     /// Set our value...
     /// </summary>
     /// <param name="a_sz"></param>
+    /// <param name="a_blMayHavePrefix"></param>
     private void SetValue(string a_sz, bool a_blMayHavePrefix)
     {
       // If we're running on a Mac, tack on the prefix 'byte'...

src/NTwain/Data/ValueReader.cs

@@ -15,6 +15,7 @@ namespace NTwain.Data
     /// <summary>
     /// Reads pointer as UTF8 string.
     /// </summary>
+    /// <param name="memMgr"></param>
     /// <param name="data">Pointer to string.</param>
     /// <param name="length">Number of bytes to read.</param>
     /// <returns></returns>

src/NTwain/TransferErrorEventArgs.cs

@@ -21,7 +21,7 @@ namespace NTwain
     /// Initializes a new instance of the <see cref="TransferErrorEventArgs"/> class.
     /// </summary>
     /// <param name="code">The code.</param>
-    /// <param name="status">Additional status info from TWAIN.</param>
+    /// <param name="info">Additional status info from TWAIN.</param>
     public TransferErrorEventArgs(STS code, string? info)
     {
       Code = code;

src/NTwain/Triplets/ControlDATs/DeviceEvent.cs

@@ -8,11 +8,6 @@ namespace NTwain.Triplets.ControlDATs
   /// </summary>
   public class DeviceEvent
   {
-    /// <summary>
-    /// Gets the device event detail.
-    /// </summary>
-    /// <param name="data"></param>
-    /// <returns></returns>
     public TWRC Get(ref TW_IDENTITY_LEGACY app, ref TW_IDENTITY_LEGACY ds, out TW_DEVICEEVENT data)
     {
       data = default;

src/NTwain/Triplets/ControlDATs/Identity.cs

@@ -19,6 +19,8 @@ namespace NTwain.Triplets.ControlDATs
     /// Opens the TWAIN data source selector dialog
     /// to choose the default data source.
     /// </summary>
+    /// <param name="app"></param>
+    /// <param name="ds"></param>
     /// <returns></returns>
     public TWRC UserSelect(ref TW_IDENTITY_LEGACY app, out TW_IDENTITY_LEGACY ds)
     {
@@ -35,6 +37,7 @@ namespace NTwain.Triplets.ControlDATs
     /// <summary>
     /// Sets the default data source.
     /// </summary>
+    /// <param name="app"></param>
     /// <param name="ds"></param>
     /// <returns></returns>
     public TWRC Set(ref TW_IDENTITY_LEGACY app, ref TW_IDENTITY_LEGACY ds)
@@ -44,6 +47,7 @@ namespace NTwain.Triplets.ControlDATs
     /// Gets the first available data source in an enumerating fashion 
     /// (use <see cref="GetNext"/> for subsequent ones).
     /// </summary>
+    /// <param name="app"></param>
     /// <param name="ds"></param>
     /// <returns></returns>
     public TWRC GetFirst(ref TW_IDENTITY_LEGACY app, out TW_IDENTITY_LEGACY ds)
@@ -54,8 +58,9 @@ namespace NTwain.Triplets.ControlDATs
 
     /// <summary>
     /// Gets the next available data source in an enumerating fashion (after using <see cref="GetFirst"/>).
-    /// Ends when return values is <see cref="STS.ENDOFLIST"/>.
+    /// Ends when return values is <see cref="TWRC.ENDOFLIST"/>.
     /// </summary>
+    /// <param name="app"></param>
     /// <param name="ds"></param>
     /// <returns></returns>
     public TWRC GetNext(ref TW_IDENTITY_LEGACY app, out TW_IDENTITY_LEGACY ds)

src/NTwain/Triplets/ControlDATs/Status.cs

@@ -9,11 +9,6 @@ namespace NTwain.Triplets.ControlDATs
   /// </summary>
   public class Status
   {
-    /// <summary>
-    /// Gets the current status for the DSM.
-    /// </summary>
-    /// <param name="status"></param>
-    /// <returns></returns>
     public TWRC GetForDSM(ref TW_IDENTITY_LEGACY app, out TW_STATUS status)
     {
       status = default;
@@ -44,11 +39,6 @@ namespace NTwain.Triplets.ControlDATs
       return rc;
     }
 
-    /// <summary>
-    /// Gets the status for the current source.
-    /// </summary>
-    /// <param name="status"></param>
-    /// <returns></returns>
     public TWRC GetForDS(ref TW_IDENTITY_LEGACY app, ref TW_IDENTITY_LEGACY ds, out TW_STATUS status)
     {
       status = default;

src/NTwain/Triplets/ControlDATs/StatusUtf8.cs

@@ -11,10 +11,11 @@ namespace NTwain.Triplets.ControlDATs
   {
     /// <summary>
     /// Gets the extended text info for a previously received <see cref="TW_STATUS"/>.
-    /// If this is called you should try to extract the string value from it once
-    /// with <see cref="TW_STATUSUTF8.ReadAndFree"/> or call <see cref="TW_STATUSUTF8.Free"/>
+    /// If this is called you should try to extract the string value from it
+    /// with <see cref="TW_STATUSUTF8.Read(IMemoryManager, bool)"/> or call <see cref="TW_STATUSUTF8.Free"/>
     /// so there's no memory leak.
     /// </summary>
+    /// <param name="app"></param>
     /// <param name="status"></param>
     /// <param name="extendedStatus"></param>
     /// <returns></returns>

src/NTwain/Triplets/ControlDATs/XferGroup.cs

@@ -8,22 +8,12 @@ namespace NTwain.Triplets.ControlDATs
   /// </summary>
   public class XferGroup
   {
-    /// <summary>
-    /// Gets the transfer group used.
-    /// </summary>
-    /// <param name="data"></param>
-    /// <returns></returns>
     public TWRC Get(ref TW_IDENTITY_LEGACY app, ref TW_IDENTITY_LEGACY ds, out DG data)
     {
       data = default;
       return DoIt(ref app, ref ds, MSG.GET, ref data);
     }
 
-    /// <summary>
-    /// Sets the transfer group to be used.
-    /// </summary>
-    /// <param name="data"></param>
-    /// <returns></returns>
     public TWRC Set(ref TW_IDENTITY_LEGACY app, ref TW_IDENTITY_LEGACY ds, DG data)
     {
       return DoIt(ref app, ref ds, MSG.SET, ref data);

src/NTwain/Triplets/DGAudio.cs

@@ -1,4 +1,5 @@
-using NTwain.Triplets.AudioDATs;
+using NTwain.Data;
+using NTwain.Triplets.AudioDATs;
 
 namespace NTwain.Triplets
 {

src/NTwain/Triplets/DGControl.cs

@@ -1,4 +1,5 @@
-using NTwain.Triplets.ControlDATs;
+using NTwain.Data;
+using NTwain.Triplets.ControlDATs;
 
 namespace NTwain.Triplets
 {

src/NTwain/TwainAppSession.Caps.cs

@@ -83,7 +83,7 @@ namespace NTwain
     /// Gets a CAP's help text (description).
     /// </summary>
     /// <param name="cap"></param>
-    /// <param name="value"></param>
+    /// <param name="help"></param>
     /// <returns></returns>
     public STS GetCapHelp(CAP cap, out string? help)
     {
@@ -98,7 +98,7 @@ namespace NTwain
     /// Gets a CAP's text name label.
     /// </summary>
     /// <param name="cap"></param>
-    /// <param name="value"></param>
+    /// <param name="label"></param>
     /// <returns></returns>
     public STS GetCapLabel(CAP cap, out string? label)
     {
@@ -113,7 +113,7 @@ namespace NTwain
     /// Gets a CAP's value label texts.
     /// </summary>
     /// <param name="cap"></param>
-    /// <param name="value"></param>
+    /// <param name="labels"></param>
     /// <returns></returns>
     public STS GetCapLabelEnum(CAP cap, out string[]? labels)
     {
@@ -127,7 +127,7 @@ namespace NTwain
     /// <summary>
     /// Sets a CAP's current value.
     /// </summary>
-    /// <param name="cap"></param>
+    /// <param name="value"></param>
     /// <returns></returns>
     public STS SetCap(ref TW_CAPABILITY value)
     {
@@ -139,7 +139,7 @@ namespace NTwain
     /// <summary>
     /// Sets a CAP's constraint values.
     /// </summary>
-    /// <param name="cap"></param>
+    /// <param name="value"></param>
     /// <returns></returns>
     public STS SetConstraint(ref TW_CAPABILITY value)
     {

src/NTwain/TwainAppSession.cs

@@ -110,7 +110,9 @@ namespace NTwain
       {
         IsBackground = true
       };
+#if WINDOWS || NETFRAMEWORK
       t.SetApartmentState(ApartmentState.STA); // just in case
+#endif
       t.Start();
     }