How can I combine sequential expression trees into a fast method?

Posted by chillitom on Stack Overflow See other posts from Stack Overflow or by chillitom
Published on 2010-03-10T17:24:10Z Indexed on 2010/03/14 9:55 UTC
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Suppose I have the following expressions:

Expression<Action<T, StringBuilder>> expr1 = (t, sb) => sb.Append(t.Name);
Expression<Action<T, StringBuilder>> expr2 = (t, sb) => sb.Append(", ");
Expression<Action<T, StringBuilder>> expr3 = (t, sb) => sb.Append(t.Description);

I'd like to be able to compile these into a method/delegate equivalent to the following:

void Method(T t, StringBuilder sb) 
{
    sb.Append(t.Name);
    sb.Append(", ");
    sb.Append(t.Description);
}

What is the best way to approach this? I'd like it to perform well, ideally with performance equivalent to the above method.

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