Error: System.TypeLoadException: Method 'Initialize' in type 'ServiceFabric.Mocks.MockReliableStateManager' from assembly 'ServiceFabric.Mocks, Version=7.1.0.0, Culture=neutral, PublicKeyToken=c8a3b3cecf8974ee' does not have an implementation.

[zhengmu]

Hitting a weird error with the ServiceFabric.Mocks.7.1.5\lib\net48\ServiceFabric.Mocks.dll. I don't have this issue before with ServiceFabric.Mocks.4.x.x

Error: System.TypeLoadException: Method 'Initialize' in type 'ServiceFabric.Mocks.MockReliableStateManager' from assembly 'ServiceFabric.Mocks, Version=7.1.0.0, Culture=neutral, PublicKeyToken=c8a3b3cecf8974ee' does not have an implementation.
at Anvil.Test.CommonUtils.BaseForgeActionSetup.TestInitialize()

I compared but didn't find any difference on Initialize(), between ServiceFabric.Mocks.7.1.5 and ServiceFabric.Mocks_4_1_1. Posted here in case someone hits it as well. ( I am using Windows 10, not Windows 11)

-------------------------------7.1.0.0--------------------------------------------------------------------------
// Decompiled with JetBrains decompiler
// Type: ServiceFabric.Mocks.MockReliableStateManager
// Assembly: ServiceFabric.Mocks, Version=7.1.0.0, Culture=neutral, PublicKeyToken=c8a3b3cecf8974ee
// MVID: B28CA8F1-0778-4DD7-826F-42291B7105AE
// Assembly location: E:\CxCache\ServiceFabric.Mocks.7.1.5\lib\net48\ServiceFabric.Mocks.dll

...

namespace ServiceFabric.Mocks
{
public class MockReliableStateManager :
IReliableStateManagerReplica2,
IReliableStateManagerReplica,
IStateProviderReplica,
IReliableStateManager,
IAsyncEnumerable,
IStateProviderReplica2

public void Initialize(
  StatefulServiceInitializationParameters initializationParameters)
{
}

---------------------------------4.1.1.0------------------------------------------------------------------------
// Decompiled with JetBrains decompiler
// Type: ServiceFabric.Mocks.MockReliableStateManager
// Assembly: ServiceFabric.Mocks, Version=4.1.1.0, Culture=neutral, PublicKeyToken=c8a3b3cecf8974ee
// MVID: 165D23E3-9D8E-4FDA-B7D9-801E8D655F51
// Assembly location: E:\temp\temp\ServiceFabric.Mocks_4_1_1.dll

...

namespace ServiceFabric.Mocks
{
public class MockReliableStateManager :
IReliableStateManagerReplica2,
IReliableStateManagerReplica,
IStateProviderReplica,
IReliableStateManager,
IAsyncEnumerable,
IStateProviderReplica2

public void Initialize(
  StatefulServiceInitializationParameters initializationParameters)
{
}

[zhengmu]

it is funny that I have been stuck for this issue for 3 days, and found the answer/mitigation in 20 minutes after I post the question here.

I got the hint from
Azure-Samples/service-fabric-dotnet-web-reference-app#36, where the last post mentioned " remove System.Fabric version 6".

I checked my dev box, which has both Fabric and Fabric SDK installed for local ServiceFabric simulator. After uninstalled both, the TypeLoadException is gone. I didn't use GAC tool at all.

[loekd]

That's weird behavior. Glad you were able to fix it.