I am using the .Net 3.5 fork of Caliburn and noticed two constructs like these in the source code:
builder = new StringBuilder();
Problem is, StringBuilder.Clear() is new in .Net 4.0 and won't compile in the .Net 3.5 fork.
May i suggest an alternative? Just replace with:
builder.Length = 0;
That works for all platforms and is as efficient as .Clear()