C# automapper mapping condition

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ASP.NET

entity-framework

Mapper

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i just want to get Communities count as well as if its community delete flag its true then count will be minus. i had wrote below code, its return all count. any suggestion fot that -

Code -

Mapper.CreateMap()
.ForMember(e => e.CommunityCount, ex => ex.MapFrom(s => s.Communities.Count))
.ForSourceMember(e => e.Builder, ex => ex.Ignore());

class file - Brand data model class file have -
public virtual ICollection Communities { get; set; },

in between Community class file have -
"public bool Deleted { get; set; }"

thanks.

What I have tried:

i tried but not getting correct solution