Scopes

Table Of Contents

• Scopes
  • List Of Scopes
    • InstancePerResolution
    • InstancePerDependency
    • SingleInstance
  • Disposal

Scopes

All registrations have a particular Scope. This tells StrongInject how long an instance resolved using that registration should live for, and how widely it should be shared.

List Of Scopes

There are currently 3 possible scopes. The default scope is InstancePerResolution but the scope can be modified per registration via the Scope enum.

InstancePerResolution

The default scope.

A single instance is shared between all dependencies created for a single resolution.

For example if A depends on B and C, and B and C both depend on an instance of D, then when A is resolved B and C will share the same instance of D.

Note every SingleInstance dependency defines a separate resolution, so if B and/or C are SingleInstance they would not share an instance of D. Similarly every lambda defines a separate resolution, so if A depends on Func<B>, then each time Func<B> is invoked a fresh instance of both B and D will be created.

InstancePerDependency

A new instance is created for every usage.

For example even if type B appears twice in the constructor of A, two different instances will be passed into the constructor.

SingleInstance

A single instance will be shared across all dependencies, from any resolution.

Disposal

A SingleInstance instance will be disposed when the container is disposed (except Instance fields and properties which are never disposed).

An InstancePerResolution or InstancePerDependency instance will be disposed when StrongInject knows it can no longer be used. This means:

• If it is a dependency of a SingleInstance it will be disposed when the container is disposed.

• Else, if it was created as part of a call to Run/RunAsync, it will be disposed, once the delegate paramater to Run/RunAsync completes.

• Else, if it was created as part of a call to Resolve/ResolveAsync, it will be disposed once the returned IOwned/IOwnedAsync is disposed.