Mark fields as readonly
Mark fields as readonly

sean-gilliam/msbuild,chipitsine/msbuild,mono/msbuild,Microsoft/msbuild,cdmihai/msbuild,jeffkl/msbuild,rainersigwald/msbuild,mono/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,jeffkl/msbuild,cdmihai/msbuild,jeffkl/msbuild,sean-gilliam/msbuild,Microsoft/msbuild,chipitsine/msbuild,mono/msbuild,jeffkl/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,chipitsine/msbuild,chipitsine/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,Microsoft/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,cdmihai/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,Microsoft/msbuild,mono/msbuild