There are two static methods in System.Uri: EscapeDataString and EscapeUriString. Use first to escape any string after '?' in uri and second one to escape any string before '?':
| Symbol | EscapeUriString | EscapeDataString |
|---|---|---|
| a | a | a |
| b | b | b |
| c | c | c |
| space | %20 | %20 |
| ? | ? | %3F |
| ! | ! | %21 |
| @ | @ | %40 |
| # | # | %23 |
| $ | $ | %24 |
| % | %25 | %25 |
| ^ | %5E | %5E |
| & | & | %26 |
| * | * | %2A |
| ( | ( | %28 |
| ) | ) | %29 |
| / | / | %2F |
| \ | %5C | %5C |
| + | + | %2B |
| _ | _ | _ |
| - | - | - |
| < | %3C | %3C |
| > | %3E | %3E |
| , | , | %2C |
| . | . | . |
| ' | ' | %27 |
| " | %22 | %22 |
| ` | %60 | %60 |
| ~ | ~ | ~ |
| а | %D0%B0 | %D0%B0 |
| б | %D0%B1 | %D0%B1 |
| в | %D0%B2 | %D0%B2 |
