Avoid params array creation
Avoid params array creation

The only use of the params constructor (outside of test code) passed two args. By adding a dedicated constructor of this arity, all temporary allocations are eliminated.

sean-gilliam/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild