Bunch of quality suggestions from Rider

Author: mdesalvo

RDFSharp/Model/RDFCollection.cs

@@ -14,9 +14,9 @@ You may obtain a copy of the License at
    limitations under the License.
 */
 
-using RDFSharp.Query;
 using System.Collections;
 using System.Collections.Generic;
+using RDFSharp.Query;
 
 namespace RDFSharp.Model
 {

RDFSharp/Model/RDFContainer.cs

@@ -14,9 +14,9 @@ You may obtain a copy of the License at
    limitations under the License.
 */
 
-using RDFSharp.Query;
 using System.Collections;
 using System.Collections.Generic;
+using RDFSharp.Query;
 
 namespace RDFSharp.Model
 {

RDFSharp/Model/RDFGraph.cs

@@ -14,14 +14,14 @@ You may obtain a copy of the License at
    limitations under the License.
 */
 
-using RDFSharp.Query;
 using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Data;
 using System.IO;
 using System.Net;
 using System.Threading.Tasks;
+using RDFSharp.Query;
 
 namespace RDFSharp.Model
 {

RDFSharp/Model/RDFModelUtilities.cs

@@ -599,7 +599,7 @@ internal static (bool,string) ValidateTypedLiteral(string literalValue, RDFModel
                 case RDFModelEnums.RDFDatatypes.RDF_XMLLITERAL:
                     try
                     {
-                        XDocument.Parse(literalValue);
+                        _ = XDocument.Parse(literalValue);
                         return (true, literalValue);
                     }
                     catch { return (false, literalValue); }
@@ -610,9 +610,8 @@ internal static (bool,string) ValidateTypedLiteral(string literalValue, RDFModel
                     return (isValidJson, literalValue);
 
                 case RDFModelEnums.RDFDatatypes.XSD_ANYURI:
-                    if (Uri.TryCreate(literalValue, UriKind.Absolute, out Uri outUri))
-                        return (true, Convert.ToString(outUri));
-                    return (false, literalValue);;
+                    return Uri.TryCreate(literalValue, UriKind.Absolute, out Uri outUri) ? (true, Convert.ToString(outUri)) 
+                                                                                         : (false, literalValue);
 
                 case RDFModelEnums.RDFDatatypes.XSD_NAME:
                     try
@@ -683,14 +682,13 @@ internal static (bool,string) ValidateTypedLiteral(string literalValue, RDFModel
                 case RDFModelEnums.RDFDatatypes.XSD_BASE64BINARY:
                     try
                     {
-                        Convert.FromBase64String(literalValue);
+                        _ = Convert.FromBase64String(literalValue);
                         return (true, literalValue);
                     }
                     catch { return (false, literalValue); }
 
                 case RDFModelEnums.RDFDatatypes.XSD_HEXBINARY:
-                    bool isValidHexBinary = hexBinary.Value.Match(literalValue).Success;
-                    return (isValidHexBinary, literalValue);
+                    return (hexBinary.Value.Match(literalValue).Success, literalValue);
                 #endregion
 
                 #region GEOGRAPHIC CATEGORY

RDFSharp/Model/RDFNamespace.cs

@@ -22,7 +22,7 @@ namespace RDFSharp.Model
     /// <summary>
     /// RDFNamespace represents a generic namespace in the RDF model.
     /// </summary>
-    public class RDFNamespace : IEquatable<RDFNamespace>
+    public sealed class RDFNamespace : IEquatable<RDFNamespace>
     {
         #region Properties
         /// <summary>

RDFSharp/Model/RDFPlainLiteral.cs

@@ -14,6 +14,7 @@ You may obtain a copy of the License at
    limitations under the License.
 */
 
+using System;
 using System.Text.RegularExpressions;
 
 namespace RDFSharp.Model
@@ -82,8 +83,8 @@ public bool HasLanguage()
         /// </summary>
         public bool HasDirection()
             => HasLanguage() 
-                && (Language.EndsWith("--ltr", System.StringComparison.OrdinalIgnoreCase)
-                    || Language.EndsWith("--rtl", System.StringComparison.OrdinalIgnoreCase));
+                && (Language.EndsWith("--ltr", StringComparison.OrdinalIgnoreCase)
+                    || Language.EndsWith("--rtl", StringComparison.OrdinalIgnoreCase));
         #endregion
     }
 }

RDFSharp/Model/RDFResource.cs

@@ -14,9 +14,9 @@ You may obtain a copy of the License at
    limitations under the License.
 */
 
-using RDFSharp.Query;
 using System;
 using System.Collections.Generic;
+using RDFSharp.Query;
 
 namespace RDFSharp.Model
 {

RDFSharp/Model/RDFTriple.cs

@@ -14,9 +14,9 @@ You may obtain a copy of the License at
    limitations under the License.
 */
 
-using RDFSharp.Query;
 using System;
 using System.Threading.Tasks;
+using RDFSharp.Query;
 
 namespace RDFSharp.Model
 {

RDFSharp/Model/Serializers/RDFTurtle.cs

@@ -14,14 +14,14 @@ You may obtain a copy of the License at
    limitations under the License.
 */
 
-using RDFSharp.Query;
 using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Text;
 using System.Text.RegularExpressions;
+using RDFSharp.Query;
 
 namespace RDFSharp.Model
 {

RDFSharp/Model/Serializers/RDFXml.cs

@@ -207,7 +207,7 @@ internal static void Serialize(RDFGraph graph, Stream outputStream)
                                                         .TrimEnd(':', '/');
                                 try
                                 {
-                                    new RDFTypedLiteral(predUri, RDFModelEnums.RDFDatatypes.XSD_QNAME);
+                                    _ = new RDFTypedLiteral(predUri, RDFModelEnums.RDFDatatypes.XSD_QNAME);
                                 }
                                 catch
                                 {