Code inspection: Loading managed type is not supported

This inspection reports reads of values whose type is managed inside Burst-compiled code.

This usually happens when Burst code reads a field, variable, or property of a class, interface, array, or another managed type. The same warning can also appear when loading System.Type values for APIs such as SharedStatic.GetOrCreate.

Example

In this example, the data field is of a managed class type. Reading it inside a Burst-compiled job is not supported.

                using Unity.Burst;
                using Unity.Jobs;

                public class ExampleData
                {
                }

                [BurstCompile]
                public struct ExampleJob : IJob
                {
                    private static ExampleData data = new ExampleData();

                    public void Execute()
                    {
                        // Reported: loading a managed type is not supported in Burst
                        var value = data;
                    }
                }
            

                using Unity.Burst;
                using Unity.Jobs;

                public struct ExampleData
                {
                    public int value;
                }

                [BurstCompile]
                public struct ExampleJob : IJob
                {
                    public ExampleData data;

                    public void Execute()
                    {
                        // Correct: Use unmanaged structs or native containers
                        var value = data.value;
                    }
                }
            

Quick-fix

This inspection does not provide a dedicated quick-fix. Fix it manually by replacing the managed value with Burst-compatible data.

26 March 2026