Remove IsNullable from ReflectionHelper and update usage

framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs

@@ -8,26 +8,6 @@ namespace Volo.Abp.Reflection;
 //TODO: Consider to make internal
 public static class ReflectionHelper
 {
-    /// <summary>
-    /// Checks whether the property is nullable, including nullable reference types (NRT).
-    /// </summary>
-    /// <param name="propertyInfo">Property info to check</param>
-    public static bool IsNullable(PropertyInfo propertyInfo)
-    {
-        if (propertyInfo.PropertyType.IsValueType)
-        {
-            return false;
-        }
-
-#if NET6_0_OR_GREATER
-        var nullabilityInfoContext = new System.Reflection.NullabilityInfoContext();
-        var nullabilityInfo = nullabilityInfoContext.Create(propertyInfo);
-        return nullabilityInfo.ReadState == System.Reflection.NullabilityState.Nullable;
-#else
-        return false;
-#endif
-    }
-
     //TODO: Ehhance summary
     /// <summary>
     /// Checks whether <paramref name="givenType"/> implements/inherits <paramref name="genericType"/>.

framework/src/Volo.Abp.Http/Volo/Abp/Http/Modeling/PropertyApiDescriptionModel.cs

@@ -3,6 +3,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Reflection;
 using Volo.Abp.Http.ProxyScripting.Configuration;
+using Volo.Abp.Reflection;
 
 namespace Volo.Abp.Http.Modeling;
 
@@ -41,7 +42,7 @@ public class PropertyApiDescriptionModel
             Type = ApiTypeNameHelper.GetTypeName(propertyInfo.PropertyType),
             TypeSimple = ApiTypeNameHelper.GetSimpleTypeName(propertyInfo.PropertyType),
             IsRequired = customAttributes.OfType<RequiredAttribute>().Any() || propertyInfo.GetCustomAttributesData().Any(attr => attr.AttributeType.Name == "RequiredMemberAttribute"),
-            IsNullable = Volo.Abp.Reflection.ReflectionHelper.IsNullable(propertyInfo),
+            IsNullable = TypeHelper.IsNullable(propertyInfo.PropertyType),
             Minimum = customAttributes.OfType<RangeAttribute>().Select(x => x.Minimum).FirstOrDefault()?.ToString(),
             Maximum = customAttributes.OfType<RangeAttribute>().Select(x => x.Maximum).FirstOrDefault()?.ToString(),
             MinLength = customAttributes.OfType<MinLengthAttribute>().FirstOrDefault()?.Length ?? customAttributes.OfType<StringLengthAttribute>().FirstOrDefault()?.MinimumLength,