In .NET reflection is slow... well, kinda slow. If you need access to the members of an arbitrary type, with the type and member-names known only at runtime - then it is frankly hard (especially for DLR types). This library makes such access easy and fast.

An introduction to the reasons behind fast-member can be found on my blog; example usage is simply:

var accessor = TypeAccessor.Create(type); 
string propName = // something known only at runtime 
while( /* some loop of data */ ) { 
    accessor[obj, propName] = rowValue; 
}

or

// obj could be static or DLR 
var wrapped = ObjectAccessor.Create(obj); 
string propName = // something known only at runtime 
Console.WriteLine(wrapped[propName]);