Some cleanup

Author: alexeyzimarev

RestSharp.sln.DotSettings

@@ -65,6 +65,7 @@
 	<s:String x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/WRAP_PARAMETERS_STYLE/@EntryValue">CHOP_IF_LONG</s:String>
 	<s:Boolean x:Key="/Default/CodeStyle/CSharpUsing/PreferQualifiedReference/@EntryValue">False</s:Boolean>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=FDIC/@EntryIndexedValue">FDIC</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=PublicFields/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="AaBb_AaBb" /&gt;</s:String>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002EDaemon_002ESettings_002EMigration_002ESwaWarningsModeSettingsMigrate/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpAttributeForSingleLineMethodUpgrade/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpKeepExistingMigration/@EntryIndexedValue">True</s:Boolean>

src/RestSharp/Parameters/ParametersCollection.cs

@@ -14,7 +14,6 @@
 // 
 
 using System.Collections;
-using System.Collections.Concurrent;
 using RestSharp.Authenticators.OAuth.Extensions;
 
 namespace RestSharp;

src/RestSharp/Request/HttpRequestMessageExtensions.cs

@@ -13,7 +13,6 @@
 // limitations under the License.
 // 
 
-using System.Text;
 using RestSharp.Extensions;
 
 namespace RestSharp;

src/RestSharp/Request/RestRequest.cs

@@ -143,13 +143,18 @@ public RestRequest(Uri resource, Method method = Method.Get, DataFormat dataForm
     internal void IncreaseNumAttempts() => Attempts++;
 
     /// <summary>
-    /// How many attempts were made to send this Request?
+    /// How many attempts were made to send this Request
     /// </summary>
     /// <remarks>
     /// This number is incremented each time the RestClient sends the request.
     /// </remarks>
     public int Attempts { get; private set; }
 
+    /// <summary>
+    /// Completion option for <seealso cref="HttpClient"/>
+    /// </summary>
+    public HttpCompletionOption CompletionOption { get; set; } = HttpCompletionOption.ResponseContentRead;
+
     /// <summary>
     /// Set this to write response to Stream rather than reading into memory.
     /// </summary>

src/RestSharp/Request/RestRequestExtensions.cs

@@ -27,6 +27,7 @@ public static class RestRequestExtensions {
     /// <param name="request"></param>
     /// <param name="name">Name of the parameter</param>
     /// <param name="value">Value of the parameter</param>
+    /// <param name="encode">Encode the value or not, default true</param>
     /// <returns>This request</returns>
     public static RestRequest AddParameter(this RestRequest request, string name, object value, bool encode = true)
         => request.AddParameter(new Parameter(name, value, ParameterType.GetOrPost, encode));

src/RestSharp/RestClient.Async.cs

@@ -69,7 +69,7 @@ async Task<InternalResponse> ExecuteInternal(RestRequest request, CancellationTo
             if (request.OnBeforeRequest != null)
                 await request.OnBeforeRequest(message);
 
-            var responseMessage = await HttpClient.SendAsync(message, ct);
+            var responseMessage = await HttpClient.SendAsync(message, request.CompletionOption, ct);
 
             if (request.OnAfterRequest != null)
                 await request.OnAfterRequest(responseMessage);

src/RestSharp/RestClient.cs

@@ -19,7 +19,6 @@
 using RestSharp.Serializers;
 using RestSharp.Serializers.Json;
 using RestSharp.Serializers.Xml;
-using static System.String;
 
 // ReSharper disable VirtualMemberCallInConstructor
 #pragma warning disable 618

src/RestSharp/Serializers/Xml/DotNetXmlSerializer.cs

@@ -51,7 +51,7 @@ public string Serialize(object obj) {
 
         ns.Add(string.Empty, Namespace);
 
-        var serializer = new System.Xml.Serialization.XmlSerializer(obj.GetType());
+        var serializer = new XmlSerializer(obj.GetType());
         var writer     = new EncodingStringWriter(Encoding);
 
         serializer.Serialize(writer, obj, ns);