has_and_array_instance_extensions_for_parameter_building.rb

#........... in my 'patches' folder

module HashParameterBuilder
	def build_parameters
		option_text = ''
		self.each do |key, value|
			option_text << "#{key}\=#{value};"
		end
		option_text.chop
	end
end

module ArrayParameterBuilder
	def build_parameters
		option_text = ''
		self.each do |value|
			option_text << "#{value};"
		end
		option_text.chop
	end
end

# ......... in my msbuild class

def targets=(targets={})
	@targets=targets
	@targets.extend(ArrayParameterBuilder)
end
	
def properties=(properties={})
	@properties = properties
	@properties.extend(HashParameterBuilder)
end
	
def build(path_to_solution)
	cmd = "\"#{@path_to_exe}\" \"#{path_to_solution}\""
	cmd << " /property:#{@properties.build_parameters}" if @properties.length>0
	cmd << " /target:#{@targets.build_parameters}" if @targets.length>0
	
	system cmd
end