How do I create a generic Expression that has an expression as a parameter

Question

There is a DisplayNameFor(x=>x.Title) helper in ASP.Net MVC. I want to implement something similar in behavior.

I want to have a method that accepts

Answer 1

something like this:

Expression> GenerateAssignExpression
    (Expression> getExpression,
    TProperty Value)
{
    var getExpressionBody = getExpression.Body as MemberExpression;
    if (getExpressionBody == null)
    {
        throw new Exception("getExpressionBody is not MemberExpression: " + 
                getExpression.Body);
    }

    var objectParameter = (ParameterExpression)getExpression.Parameters[0];
    ConstantExpression constant = Expression.Constant(Value, typeof(TProperty));
    var expAssign = Expression.Assign(e.Body, constant);

    return Expression.Lambda>(expAssign, 
            objectParameter, 
            valueParameter);
}