How to clean-up an Entity Framework object context?

Question

I am adding several entities to an object context. ``` try { forach (var document in documents) { this.Validate(document); // May throw a ValidationException. this.objectContext.AddToDocuments(document); } this.objectContext.SaveChanges(); } catch { // How to clean-up the object context here? throw; } ``` If some of the documents pass the the validation and one fails, all documents that passed the validation remain added to the object context. I have to clean-up the object context because it may be reused and the following can happen. ``` var documentA = new Document { Id = 1, Data = "ValidData" }; var documentB = new Document { Id = 2, Data = "InvalidData" }; var documentC = new Document { Id = 3, Data = "ValidData" }; try { // Adding document B will cause a ValidationException but only // after document A is added to the object context. this.DocumentStore.AddDocuments(new[] { documentA, documentB, documentC }); } catch (ValidationException) { } // Try again without the invalid docum…

Accepted Answer

It was just a trivial bug but I am going to leave the question here - maybe it helps others.

I had the following

```
var objectStateEntries = this.objectContext
                             .ObjectStateManager
                             .GetObjectStateEntries(EntityState.Added);

foreach (var objectStateEntry in objectStateEntries)
{
    this.objectContext.Detach(objectStateEntry);
}
```

while I wanted the following

```
foreach (var objectStateEntry in objectStateEntries)
{
    this.objectContext.Detach(objectStateEntry.Entity);
}
```

and couldn't see it.

How to clean-up an Entity Framework object context?

Solution

Problem