MemberInitExpression Class

Class Animal
   Public Species As String
   Public Age As Integer
End Class

Shared Sub CreateMemberInitExpression()
   Dim newAnimal As System.Linq.Expressions.NewExpression = _
       System.Linq.Expressions.Expression.[New](Type.GetType("SilverlightApplication.MemberInitExample+Animal"))
   Dim speciesMember As System.Reflection.MemberInfo = _
       Type.GetType("SilverlightApplication.MemberInitExample+Animal").GetMember("Species")(0)
   Dim ageMember As System.Reflection.MemberInfo = _
       Type.GetType("SilverlightApplication.MemberInitExample+Animal").GetMember("Age")(0)
   ' Create a MemberBinding object for each member
   ' that you want to initialize.
   Dim speciesMemberBinding As System.Linq.Expressions.MemberBinding = _
       System.Linq.Expressions.Expression.Bind( _
           speciesMember, _
           System.Linq.Expressions.Expression.Constant("horse"))
   Dim ageMemberBinding As System.Linq.Expressions.MemberBinding = _
       System.Linq.Expressions.Expression.Bind( _
           ageMember, _
           System.Linq.Expressions.Expression.Constant(12))

   ' Create a MemberInitExpression that represents initializing
   ' two members of the 'Animal' class.
   Dim memberInitExpression As System.Linq.Expressions.MemberInitExpression = _
       System.Linq.Expressions.Expression.MemberInit( _
           newAnimal, _
           speciesMemberBinding, _
           ageMemberBinding)

   outputBlock.Text &= memberInitExpression.ToString() & vbCrLf

   ' This code produces the following output:
   '
   ' new Animal() {Species = "horse", Age = 12}
End Sub

class Animal
{
   public string Species { get; set; }
   public int Age { get; set; }
}

public static void CreateMemberInitExpression(System.Windows.Controls.TextBlock outputBlock)
{
   System.Linq.Expressions.NewExpression newAnimal =
       System.Linq.Expressions.Expression.New(typeof(Animal));

   System.Reflection.MemberInfo speciesMember =
       typeof(Animal).GetMember("Species")[0];
   System.Reflection.MemberInfo ageMember =
       typeof(Animal).GetMember("Age")[0];

   // Create a MemberBinding object for each member
   // that you want to initialize.
   System.Linq.Expressions.MemberBinding speciesMemberBinding =
       System.Linq.Expressions.Expression.Bind(
           speciesMember,
           System.Linq.Expressions.Expression.Constant("horse"));
   System.Linq.Expressions.MemberBinding ageMemberBinding =
       System.Linq.Expressions.Expression.Bind(
           ageMember,
           System.Linq.Expressions.Expression.Constant(12));

   // Create a MemberInitExpression that represents initializing
   // two members of the 'Animal' class.
   System.Linq.Expressions.MemberInitExpression memberInitExpression =
       System.Linq.Expressions.Expression.MemberInit(
           newAnimal,
           speciesMemberBinding,
           ageMemberBinding);

   outputBlock.Text += memberInitExpression.ToString() + "\n";

   // This code produces the following output:
   //
   // new Animal() {Species = "horse", Age = 12}
}