Listing all members in Umbraco:

Members.cshtml

@using Umbraco.Core.Services
@inherits UmbracoViewPage

@{

    IMemberService ms = UmbracoContext.Application.Services.MemberService;

    int total;    
    foreach (IMember member in ms.GetAll(0, Int32.MaxValue, out total)) {
        
        <p>@member.Name</p>
        
    }
    
}