Ruby is sexy :)

sexy.rb

class CommandLineExecuter
  def self.execute(cli,props = {},nameless_param)
    parameters = props.collect { |key,value| "/#{key}=#{value}" }.join " "
    exec("#{cli} #{nameless_param} #{parameters}") 
  end
end

#Sample usage 
CommandLineExecuter.execute "notepad" 

CommandLineExecuter.execute "cmd", {:T=> "0A"}

CommandLineExecuter.execute "msbuild", {:Configuration => "Relese", :Platform => "AnyCPU"}, "myproject.csproj"