Reads identities for given descriptors. First try IMS store. If not found, optionally try source like AD. The actual source will be indicated by a property of the identity object itself. Note - performs FASTEST when no membership information is requested.
Namespace:  Microsoft.TeamFoundation.Server.Core
Assembly:  Microsoft.TeamFoundation.Server.Core (in Microsoft.TeamFoundation.Server.Core.dll)
Syntax
'Declaration
Function ReadIdentities ( _
    requestContext As TeamFoundationRequestContext, _
    descriptors As IdentityDescriptor(), _
    queryMembership As MembershipQuery, _
    readOptions As ReadIdentityOptions, _
    propertyNameFilters As IEnumerable(Of String), _
    propertyScope As IdentityPropertyScope _
) As TeamFoundationIdentity()
TeamFoundationIdentity[] ReadIdentities(
    TeamFoundationRequestContext requestContext,
    IdentityDescriptor[] descriptors,
    MembershipQuery queryMembership,
    ReadIdentityOptions readOptions,
    IEnumerable<string> propertyNameFilters,
    IdentityPropertyScope propertyScope
)
array<TeamFoundationIdentity^>^ ReadIdentities(
    TeamFoundationRequestContext^ requestContext, 
    array<IdentityDescriptor^>^ descriptors, 
    MembershipQuery queryMembership, 
    ReadIdentityOptions readOptions, 
    IEnumerable<String^>^ propertyNameFilters, 
    IdentityPropertyScope propertyScope
)
abstract ReadIdentities : 
        requestContext:TeamFoundationRequestContext * 
        descriptors:IdentityDescriptor[] * 
        queryMembership:MembershipQuery * 
        readOptions:ReadIdentityOptions * 
        propertyNameFilters:IEnumerable<string> * 
        propertyScope:IdentityPropertyScope -> TeamFoundationIdentity[] 
function ReadIdentities(
    requestContext : TeamFoundationRequestContext, 
    descriptors : IdentityDescriptor[], 
    queryMembership : MembershipQuery, 
    readOptions : ReadIdentityOptions, 
    propertyNameFilters : IEnumerable<String>, 
    propertyScope : IdentityPropertyScope
) : TeamFoundationIdentity[]
Parameters
requestContext
Type: Microsoft.TeamFoundation.Framework.Server.TeamFoundationRequestContextThe context for this request.
descriptors
Type: array<Microsoft.VisualStudio.Services.Identity.IdentityDescriptor[]The descriptors.
queryMembership
Type: Microsoft.TeamFoundation.Framework.Common.MembershipQueryNone, direct or expanded membership information.
readOptions
Type: Microsoft.TeamFoundation.Framework.Common.ReadIdentityOptionsThe read options.
propertyNameFilters
Type: System.Collections.Generic.IEnumerable<String>Only required when read options includes extended properties, refer Prpoperty Service API. Can be null otherwise.
- propertyScope
Type: Microsoft.TeamFoundation.Framework.Common.IdentityPropertyScope 
Return Value
Type: array<Microsoft.TeamFoundation.Server.Core.TeamFoundationIdentity[]
Array of identities, corresponding 1 to 1 with input array.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.