Update formatting

Author: stevejgordon

src/Elastic.Apm/Report/Serialization/PayloadItemSerializer.cs

@@ -45,8 +45,7 @@ internal PayloadItemSerializer() =>
 					{
 						foreach (var prop in j.Properties)
 						{
-							var maxLengthAttribute = prop.AttributeProvider.GetCustomAttributes(typeof(MaxLengthAttribute), false).FirstOrDefault() as MaxLengthAttribute;
-							if (maxLengthAttribute != null)
+							if (prop.AttributeProvider.GetCustomAttributes(typeof(MaxLengthAttribute), false).FirstOrDefault() is MaxLengthAttribute maxLengthAttribute)
 								prop.CustomConverter = new TruncateJsonConverter(maxLengthAttribute.Length);
 
 							if (prop.PropertyType == typeof(Lazy<Context>))

test/Elastic.Apm.Tests.MockApmServer/Controllers/IntakeV2EventsController.cs

@@ -105,10 +105,7 @@ private async Task ParsePayloadLineAndAddToReceivedData(string line)
 				new JsonSerializerOptions
 				{
 					UnmappedMemberHandling = JsonUnmappedMemberHandling.Disallow,
-				});
-
-			if (payload is null)
-				throw new ArgumentException("Deserialization failed");
+				}) ?? throw new ArgumentException("Deserialization failed");
 
 			await HandleParsed(nameof(payload.Error), payload.Error, _mockApmServer.ReceivedData.Errors, _mockApmServer.AddError);
 			await HandleParsed(nameof(payload.Metadata), payload.Metadata, _mockApmServer.ReceivedData.Metadata, _mockApmServer.AddMetadata);