ALTER VIEW [dbo].[VTypeObject] AS
SELECT A.*, C.* FROM TypeObject A
INNER JOIN TypeObject2Nsi B
ON A.IdObject = B.IdObject
INNER JOIN TypeAndVersionNsi C
ON B.IdNsi = C.IdNsi
GO

public class TypeObject
    {
        public int IdObject { get; set; } // IdObject
        public string ObjectName { get; set; } // ObjectName
        public int IdNsi { get; set; } // IdNsi
        public string NsiName { get; set; } // NsiName
        public Guid СurrentVersion { get; set; } // СurrentVersion
    }

    public class TypeObjectConfiguration : EntityTypeConfiguration<TypeObject>
    {
        public TypeObjectConfiguration()
            : this("dbo")
        {
        }

        public TypeObjectConfiguration(string schema)
        {
            ToTable(schema + ".VTypeObject");
            HasKey(x => new { x.IdObject, x.ObjectName, x.IdNsi, x.NsiName, x.СurrentVersion });

            Property(x => x.IdObject).HasColumnName("IdObject").IsRequired().HasColumnType("int");
            Property(x => x.ObjectName).HasColumnName("ObjectName").IsRequired().IsUnicode(false).HasColumnType("varchar").HasMaxLength(50);
            Property(x => x.IdNsi).HasColumnName("IdNsi").IsRequired().HasColumnType("int");
            Property(x => x.NsiName).HasColumnName("NsiName").IsRequired().IsUnicode(false).HasColumnType("varchar").HasMaxLength(50);
            Property(x => x.СurrentVersion).HasColumnName("СurrentVersion").IsRequired().HasColumnType("uniqueidentifier");
        }
    }