Use the extension method of SystemTextJson.

framework/src/Volo.Abp.Json/Volo/Abp/Json/SystemTextJson/JsonConverters/AbpHasExtraPropertiesJsonConverter.cs

@@ -27,12 +27,13 @@ namespace Volo.Abp.Json.SystemTextJson.JsonConverters
             var rootElement = JsonDocument.ParseValue(ref reader).RootElement;
             if (rootElement.ValueKind == JsonValueKind.Object)
             {
-                var extensibleObject = JsonSerializer.Deserialize<T>(rootElement.GetRawText(), newOptions);
+                var extensibleObject = rootElement.Deserialize<T>(newOptions);
 
                 var extraPropertiesJsonProperty = rootElement.EnumerateObject().FirstOrDefault(x => x.Name.Equals(nameof(IHasExtraProperties.ExtraProperties), StringComparison.OrdinalIgnoreCase));
+                
                 if (extraPropertiesJsonProperty.Value.ValueKind == JsonValueKind.Object)
                 {
-                    var extraPropertyDictionary = JsonSerializer.Deserialize(extraPropertiesJsonProperty.Value.GetRawText(), typeof(ExtraPropertyDictionary), newOptions);
+                    var extraPropertyDictionary = extraPropertiesJsonProperty.Value.Deserialize(typeof(ExtraPropertyDictionary), newOptions);
                     ObjectHelper.TrySetProperty(extensibleObject, x => x.ExtraProperties, () => extraPropertyDictionary);
                 }
 

framework/test/Volo.Abp.MemoryDb.Tests/Volo/Abp/MemoryDb/JsonConverters/EntityJsonConverter.cs

@@ -13,12 +13,12 @@ namespace Volo.Abp.MemoryDb.JsonConverters
             var jsonDocument = JsonDocument.ParseValue(ref reader);
             if (jsonDocument.RootElement.ValueKind == JsonValueKind.Object)
             {
-                var entity = (TEntity)JsonSerializer.Deserialize(jsonDocument.RootElement.GetRawText(), typeToConvert);
+                var entity = (TEntity)jsonDocument.RootElement.Deserialize(typeToConvert);
 
                 var idJsonElement = jsonDocument.RootElement.GetProperty(nameof(Entity<object>.Id));
                 if (idJsonElement.ValueKind != JsonValueKind.Undefined)
                 {
-                    var id = JsonSerializer.Deserialize<TKey>(idJsonElement.GetRawText());
+                    var id = idJsonElement.Deserialize<TKey>();
                     if (id != null)
                     {
                         EntityHelper.TrySetId(entity, () => id);

modules/feature-management/src/Volo.Abp.FeatureManagement.Application.Contracts/Volo/Abp/FeatureManagement/JsonConverters/SelectionStringValueItemSourceJsonConverter.cs

@@ -19,7 +19,7 @@ namespace Volo.Abp.FeatureManagement.JsonConverters
                 var newOptions = JsonSerializerOptionsHelper.Create(options, this);
 
                 var selectionStringValueItem =
-                    JsonSerializer.Deserialize<LocalizableSelectionStringValueItem[]>(itemsJsonProperty.Value.GetRawText(), newOptions) ??
+                    itemsJsonProperty.Value.Deserialize<LocalizableSelectionStringValueItem[]>(newOptions) ??
                     Array.Empty<LocalizableSelectionStringValueItem>();
 
                 return new StaticSelectionStringValueItemSource(selectionStringValueItem.As<ISelectionStringValueItem[]>());

modules/feature-management/src/Volo.Abp.FeatureManagement.Application.Contracts/Volo/Abp/FeatureManagement/JsonConverters/StringValueTypeJsonConverter.cs

@@ -22,9 +22,9 @@ namespace Volo.Abp.FeatureManagement.JsonConverters
 
                 return name switch
                 {
-                    "SelectionStringValueType" =>  JsonSerializer.Deserialize<SelectionStringValueType>(rootElement.GetRawText(), newOptions),
+                    "SelectionStringValueType" =>  rootElement.Deserialize<SelectionStringValueType>(newOptions),
-                    "FreeTextStringValueType" => JsonSerializer.Deserialize<FreeTextStringValueType>(rootElement.GetRawText(), newOptions),
+                    "FreeTextStringValueType" => rootElement.Deserialize<FreeTextStringValueType>(newOptions),
-                    "ToggleStringValueType" => JsonSerializer.Deserialize<ToggleStringValueType>(rootElement.GetRawText(), newOptions),
+                    "ToggleStringValueType" => rootElement.Deserialize<ToggleStringValueType>(newOptions),
                     _ => throw new ArgumentException($"{nameof(IStringValueType)} named {name} was not found!")
                 };
             }

modules/feature-management/src/Volo.Abp.FeatureManagement.Application.Contracts/Volo/Abp/FeatureManagement/JsonConverters/ValueValidatorJsonConverter.cs

@@ -23,7 +23,7 @@ namespace Volo.Abp.FeatureManagement.JsonConverters
                 if (propertiesJsonProperty.Value.ValueKind == JsonValueKind.Object)
                 {
                     var newOptions = JsonSerializerOptionsHelper.Create(options, this, new ObjectToInferredTypesConverter());
-                    var properties = JsonSerializer.Deserialize<IDictionary<string, object>>(propertiesJsonProperty.Value.GetRawText(), newOptions);
+                    var properties = propertiesJsonProperty.Value.Deserialize<IDictionary<string, object>>(newOptions);
                     if (properties != null && properties.Any())
                     {
                         foreach (var property in properties)