"CachedAnonymousMethodDelegate" and exception

Question

In our deployed application(in AFS), a call to a member function from another member function in the
same class is failing with an exception "absolute path information is required".
My locally build application is working fine. Our application is configured as "AnyCpu" and “Debug”. I have tried msbuild build in my machine using a 32 bit msbuild and 64 bit msbuild. In both cases
the assembly created is running without a problem. So it is the build machine which is producing the problem dll
We thought we should find the core cause of the issue
Details:
The "problem" class.
 [Export("SomeName",
typeof(IDataPresenter))]
[PartCreationPolicy(CreationPolicy.NonShared)]
public class
SomeDataPresenter : MyDataPresenter
  protected void
BeginFieldsWithDi(ReportFields reportDefinition)
    if(reportDefinition.ReportDimension != null)
reportDefinition.ReportDimension.ForEach(x =>x.LogicalName=_reportHelper.AddDiStart(x.LogicalName));
    if(reportDefinition.ReportMeasure != null)
reportDefinition.ReportMeasure.ForEach(x => x.LogicalName =
_reportHelper.AddDiStart(x.LogicalName));
protected override
bool UpdateReport(ReportFields reportDefinition, bool isReportExecution)
//the following call is failing with exception"absolute path information is required".    
BeginFieldsWithDi(ReportFields reportDefinition);
//the base classes just for clarity
[PartCreationPolicy(CreationPolicy.NonShared)]
public class
MyDataPresenter: BaseDataPresenter, IMyDataPresenter
[Export("DefaultReportDataPresenter", typeof(IDataPresenter))] 
[PartCreationPolicy(CreationPolicy.NonShared)]
 public class
BaseDataPresenter: Model, IBaseDataPresenter
For BeginFieldsWithDi() function the IL in my local machine and the deployed IL is different(Only the beginning part which is given below)
IL in my machine
.method family hidebysig instance void  RemoveDiFromFields() cil managed{
  // Code size       119 (0x77)
  .maxstack  3
  .locals init ([0] class [mscorlib]System.Action`1<class [MyApp.Infra]ReportFieldsReportDimension> 'CS$<>9__CachedAnonymousMethodDelegatef',
           [1] class [mscorlib]System.Action`1<class [MyApp.Infra]ReportMeasure> 'CS$<>9__CachedAnonymousMethodDelegate10',
           [2] bool CS$4$0000)
  IL_0000:  ldnull
  IL_0001:  stloc.0
  IL_0002:  ldnull
  IL_0003:  stloc.1
  IL_0004:  nop
  IL_0005:  ldarg.0
  IL_0006:  call       instance class [MyApp.Infra]ReportFields [MyApp.Modules.Ux]MyApp.Modules.Ux.Controls.VirtualGrid.Applications.Controllers.ReportDataPresenter::get_ColumnMetadata()
IL from deployed DLL
.method family hidebysig instance void  RemoveDiFromFields() cil managed
  // Code size       119 (0x77)
  .maxstack  3
  .locals init (class [mscorlib]System.Action`1<class [MyApp.Infra]ReportFieldsReportDimension> V_0,
           class [mscorlib]System.Action`1<class [MyApp.Infra]ReportMeasure> V_1,
           bool V_2)
  IL_0000:  ldnull
  IL_0001:  stloc.0
  IL_0002:  ldnull
  IL_0003:  stloc.1
  IL_0004:  nop
  IL_0005:  ldarg.0
  IL_0006:  call       instance class [MyApp.Infra]ReportFields [MyApp.Modules.Ux]MyApp.Modules.Ux.Controls.VirtualGrid.Applications.Controllers.ReportDataPresenter::get_ColumnMetadata()
Question: What causes the IL to generate “CachedAnonymousMethodDelegate” entry in my machine and does not in the build machine (which is deployed)? 
If we can deduct the cause of the exception("absolute path information is required") from above, what is it?

Answer 1

Hello @varghesejim,
CachedAnonymousMethodDelegate in IL is used because "Delegates for anonymous methods are cached"
https://msdn.microsoft.com/en-us/library/0yw3tz5k.aspx
http://stackoverflow.com/questions/9394950/is-there-any-overhead-in-the-use-of-anonymous-methods
So here "Lambda expressions" seems to be the problem of this issue based on your IL because 'A lambda expression is an anonymous function that can contain expressions and statements.
I checked about this case and suddenly find that you've already shared the solution, thanks for sharing the result code back.
Best regards,
Barry
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