“自我投射” Linq

Question

I am new to the System.Linq.Expressions namespace, but it seems you can do some pretty awesome things.

I would like to create a "self projecting" lambda expression using the System.Linq.Expressions objects. Something like:

 list.Select(element => element);

I stumbled across a sample where they build a "property projecting" lambda expression using the following snippet:

 //creates something like: list.Select(element => element.[propertyName])

 var parameter = Expression.Parameter(elementType, "posting");
 Expression property = Expression.Property(parameter, propertyName);

 LambdaExpression lambda = Expression.Lambda(property, new[] { parameter });

But how I can create a self-projecting lambda?

Thanks!

Answer 1

Would the following do what you require:

var parameter = Expression.Parameter(elementType, "posting");
var lambda = Expression.Lambda(parameter, new[] { parameter });