Method AddSingleton

AddSingleton<T>(IServiceCollection)

Adds a singleton service of the type specified in T to the specified IServiceCollection.

Declaration

public static IServiceCollection AddSingleton<T>(this IServiceCollection serviceCollection) where T : class

Parameters

Type	Name	Description
IServiceCollection	serviceCollection	The IServiceCollection to add the service to.

Returns

Type	Description
IServiceCollection	The IServiceCollection so that additional calls can be chained.

Type Parameters

Name	Description
T	The type of the service to add.

Exceptions

Type	Condition
ArgumentNullException	Thrown when serviceCollection is null.

AddSingleton<TService, TImplementation>(IServiceCollection)

Adds a singleton service of the type specified in TService with an implementation type specified in TImplementation to the specified IServiceCollection.

Declaration

public static IServiceCollection AddSingleton<TService, TImplementation>(this IServiceCollection serviceCollection) where TService : class where TImplementation : class, TService

Parameters

Type	Name	Description
IServiceCollection	serviceCollection	The IServiceCollection to add the service to.

Returns

Type	Description
IServiceCollection	The IServiceCollection so that additional calls can be chained.

Type Parameters

Name	Description
TService	The type of the service to add.
TImplementation	The type of the implementation to use.

Exceptions

Type	Condition
ArgumentNullException	Thrown when serviceCollection is null.

AddSingleton(IServiceCollection, Type)

Adds a singleton service of the type specified in serviceType to the specified IServiceCollection.

Declaration

public static IServiceCollection AddSingleton(this IServiceCollection serviceCollection, Type serviceType)

Parameters

Type	Name	Description
IServiceCollection	serviceCollection	The IServiceCollection to add the service to.
Type	serviceType	The type of the service to add.

Returns

Type	Description
IServiceCollection	The IServiceCollection so that additional calls can be chained.

Exceptions

Type	Condition
ArgumentNullException	Thrown when serviceCollection or serviceType is null.

AddSingleton(IServiceCollection, Type, Type)

Adds a singleton service of the type specified in serviceType with an implementation type specified in implementationType to the specified IServiceCollection.

Declaration

public static IServiceCollection AddSingleton(this IServiceCollection serviceCollection, Type serviceType, Type implementationType)

Parameters

Type	Name	Description
IServiceCollection	serviceCollection	The IServiceCollection to add the service to.
Type	serviceType	The type of the service to add.
Type	implementationType	The type of the implementation to use.

Returns

Type	Description
IServiceCollection	The IServiceCollection so that additional calls can be chained.

Exceptions

Type	Condition
ArgumentNullException	Thrown when serviceCollection, serviceType or implementationType is null.