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BinaryFormatter Serialization and Deserialization Are Disabled
Learn why .NET 5 projects may throw the error 'BinaryFormatter serialization and deserialization are disabled within this application' and how to fix it.
troubleshooting
Error related to disabled BinaryFormatter serialization in .NET 5
binaryformatter-exception-after-upgrade-to-net5
.NET 5.0
1494918
kb

Environment

Product Progress® Telerik® Reporting Up to R3 2020

Description

The following error might be thrown after upgrade to .NET 5 from .NET Core or Blazor Projects.

Error Message

Error registering the viewer with the service.
An error has occurred.
BinaryFormatter serialization and deserialization are disabled within this application. See https://aka.ms/binaryformatter for more information.

Solution

In the Telerik Reporting R1 2021(15.0.21.120) release, the issue is resolved. If you are using a previous version, we strongly recommend upgrading. If that's not possible, you can use the suggested workaround below.

Suggested Workarounds

Add the following lines of code to the csproj file:

<PropertyGroup>
	<TargetFramework>net5.0</TargetFramework>
	<EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
</PropertyGroup>