convert the below code to c#


from PythonApplication1 import Pdh, PimDB, Reconciliation
import sys
import json
import os

def get_date():
    date = input("Enter the date to extract in the form yyyy-mm-dd:")
    return date

def get_conf(conf_json):
	if (os.path.exists(conf_json)):
		with open(conf_json) as job_json:
			conf = json.load(job_json)
	else:
		print (conf_json, "doesn't exist")
		
	return conf


try:
    reports_txt = '''
    -----------------------------------------------------------------------------------------------------
                              _____      _____     __  __                                
                             |  __ \    |_   _|   |  \/  |                               
                             | |__) |     | |     | \  / |                               
                             |  ___/      | |     | |\/| |                               
                             | |         _| |_    | |  | |                               
                             |_|        |_____|   |_|  |_|                               
        _____            _               ______          _                           _         
        |  __ \          | |             |  ____|        | |                         | |        
        | |  | |   __ _  | |_    __ _    | |__    __  __ | |_   _ __    __ _    ___  | |_   ___ 
        | |  | |  / _` | | __|  / _` |   |  __|   \ \/ / | __| | '__|  / _` |  / __| | __| / __|
        | |__| | | (_| | | |_  | (_| |   | |____   >  <  | |_  |