Исправляет некоторые предупреждения

VkNet.Tests/Categories/Ads/AdsGetAdsTests.cs

@@ -33,7 +33,7 @@ public void GetAds_GenerateAdsCorrectly()
 		ads.Should()
 			.NotBeEmpty();
 
-		var ad = ads.FirstOrDefault();
+		var ad = ads.First();
 
 		ads.Should()
 			.ContainSingle();

VkNet/Enums/SafetyEnums/Privacy.cs

@@ -1,4 +1,5 @@
-using System.Text.RegularExpressions;
+using System.Diagnostics.CodeAnalysis;
+using System.Text.RegularExpressions;
 using Newtonsoft.Json;
 using VkNet.Utils;
 using VkNet.Utils.JsonConverter;
@@ -9,7 +10,7 @@ namespace VkNet.Enums.SafetyEnums;
 /// Уровень доступа к комментированию альбома
 /// </summary>
 [JsonConverter(typeof(SafetyEnumJsonConverter))]
-public sealed class Privacy : SafetyEnum<Privacy>
+public sealed partial class Privacy : SafetyEnum<Privacy>
 {
 	/// <summary>
 	/// Доступно всем пользователям.
@@ -77,6 +78,8 @@ public sealed class Privacy : SafetyEnum<Privacy>
 	/// <returns>
 	/// Уровень доступа к комментированию альбома
 	/// </returns>
+	[SuppressMessage("Performance", "CA1866:Использовать перегрузку символов", Justification = "Не поддерживается в netstandard2.0")]
+	[SuppressMessage("Performance", "SYSLIB1045:Преобразовать в \"GeneratedRegexAttribute\".", Justification = "Не поддерживается в netstandard2.0")]
 	public new static Privacy FromJson(VkResponse response)
 	{
 		switch (response.ToString())
@@ -122,11 +125,10 @@ public sealed class Privacy : SafetyEnum<Privacy>
 			{
 				var input = response.ToString();
 				var idPattern = new Regex(pattern: @"([\d]+)");
-				long id;
 
 				long.TryParse(idPattern.Match(input: input)
 					.Groups[groupnum: 1]
-					.Value, out id);
+					.Value, out var id);
 
 				if (input.StartsWith(value: "list"))
 				{

VkNet/Infrastructure/Authorization/ImplicitFlow/AuthorizationFormHtmlParser.cs

@@ -87,10 +87,10 @@ private static Dictionary<string, string> ParseInputs(HtmlNode formNode)
 	{
 		var inputs = new Dictionary<string, string>();
 
-		foreach (var node in formNode.SelectNodes("//input"))
+		foreach (var nodeAttributes in formNode.SelectNodes("//input").Select(x => x.Attributes))
 		{
-			var nameAttribute = node.Attributes["name"];
-			var valueAttribute = node.Attributes["value"];
+			var nameAttribute = nodeAttributes["name"];
+			var valueAttribute = nodeAttributes["value"];
 
 			var name = nameAttribute is not null
 				? nameAttribute.Value

VkNet/Infrastructure/JsonConfigure.cs

@@ -26,10 +26,9 @@ internal static JObject ToJObject(this string answer)
 		{
 			using var stringReader = new StringReader(answer);
 
-			using JsonReader jsonReader = new JsonTextReader(stringReader)
-			{
-				MaxDepth = null
-			};
+			using JsonReader jsonReader = new JsonTextReader(stringReader);
+
+			jsonReader.MaxDepth = null;
 
 			return JObject.Load(jsonReader);
 		}

VkNet/Utils/JsonConverter/SafetyEnumJsonConverter.cs

@@ -64,12 +64,8 @@ public override object ReadJson(JsonReader reader, Type objectType, object exist
 		var methods = result.GetType()
 			.GetMethods(bindingAttr: BindingFlags.NonPublic|BindingFlags.Public|BindingFlags.Static|BindingFlags.FlattenHierarchy);
 
-		result = methods
-			.FirstOrDefault(predicate: x => x.Name == "FromJsonString")
-			?.Invoke(result, new object[]
-			{
-				$"{value}"
-			});
+		result = Array.Find(methods, x => x.Name == "FromJsonString")
+			?.Invoke(result, [$"{value}"]);
 
 		var fields = result?.GetType()
 			.GetFields();

VkNet/Utils/JsonConverter/TolerantStringEnumConverter.cs

@@ -10,10 +10,7 @@ namespace VkNet.Utils.JsonConverter;
 public class TolerantStringEnumConverter : StringEnumConverter
 {
 	/// <inheritdoc />
-	public TolerantStringEnumConverter()
-	{
-		NamingStrategy = new SnakeCaseNamingStrategy();
-	}
+	public TolerantStringEnumConverter() => NamingStrategy = new SnakeCaseNamingStrategy();
 
 	/// <inheritdoc />
 	public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
@@ -22,9 +19,11 @@ public override object ReadJson(JsonReader reader, Type objectType, object exist
 		{
 			return base.ReadJson(reader, objectType, existingValue, serializer);
 		}
-		catch(System.Exception e)
+		catch (System.Exception e)
 		{
-			var parameter = serializer.Context.TryGetTypeData(typeof(TolerantStringEnumConverter), out var s) ? (bool?)s : null;
+			var parameter = serializer.Context.TryGetTypeData(typeof(TolerantStringEnumConverter), out var s)
+				? (bool?) s
+				: null;
 
 			if (IsNullableType(objectType) && parameter is true)
 			{
@@ -36,8 +35,5 @@ public override object ReadJson(JsonReader reader, Type objectType, object exist
 		}
 	}
 
-	private static bool IsNullableType(Type t)
-	{
-		return t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>);
-	}
+	private static bool IsNullableType(Type t) => t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>);
 }

VkNet/Utils/JsonConverter/VkDefaultJsonConverter.cs

@@ -62,5 +62,9 @@ public override object ReadJson(JsonReader reader, Type objectType, object exist
 	/// <c> true </c> if this instance can convert the specified object type;
 	/// otherwise, <c> false </c>.
 	/// </returns>
-	public override bool CanConvert(Type objectType) => !objectType.IsArray && objectType.IsSerializable;
+	public override bool CanConvert(Type objectType) => objectType is
+	{
+		IsArray: false,
+		IsSerializable: true
+	};
 }

VkNet/Utils/Utilities.cs

@@ -111,14 +111,9 @@ public static string PrettyPrintJson(string json)
 		{
 			var jObject = json.ToJObject();
 
-
-
-			foreach (var key in keysToHide)
+			foreach (var key in keysToHide.Where(x => jObject.ContainsKey(x)))
 			{
-				if (jObject.ContainsKey(key))
-				{
-					jObject[key] = hidden;
-				}
+				jObject[key] = hidden;
 			}
 
 			return jObject.ToString(Formatting.Indented);
@@ -223,6 +218,7 @@ private static string ToCamelCase(this string str) => str.Split(new[]
 		{
 			return null;
 		}
+
 		return t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>);
 	}
 
@@ -237,11 +233,13 @@ public static bool IsNullableStringEnum(Type t)
 	{
 		var isNull = IsNullableType(t.GenericTypeArguments.FirstOrDefault());
 		StringEnumAttribute myAttribute = null;
+
 		if (isNull is null)
 		{
 			isNull = true;
 		}
-		if(isNull is false)
+
+		if (isNull is false)
 		{
 			myAttribute = (StringEnumAttribute) Attribute.GetCustomAttribute(t.GenericTypeArguments.FirstOrDefault(),
 				typeof(StringEnumAttribute));
@@ -263,11 +261,13 @@ public static bool IsTolerantEnum(Type t)
 	{
 		var isNull = IsNullableType(t.GenericTypeArguments.FirstOrDefault());
 		JsonConverterAttribute myAttribute = null;
+
 		if (isNull is null)
 		{
 			isNull = true;
 		}
-		if(isNull is false)
+
+		if (isNull is false)
 		{
 			myAttribute = (JsonConverterAttribute) Attribute.GetCustomAttribute(t.GenericTypeArguments.FirstOrDefault(),
 				typeof(JsonConverterAttribute));

VkNet/VkNet.csproj

@@ -27,6 +27,7 @@
 		</PackageReleaseNotes>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
 		<LangVersion>latest</LangVersion>
+		<NoWarn>S1133;S1135;S2346</NoWarn>
 	</PropertyGroup>
 
 	<PropertyGroup>