If you look at rfc 3986 appendix a, you will see that space is simply not mentioned anywhere in the grammar for defining a url. The common space character is encoded as %20 as you noted yourself. What is the difference and why should this happen? · a bit of explaining as to what that %2520 is : @metabyter i think it is more technically correct to phrase the question as in a url, should i encode the spaces using %20 or + in the query part of a url? because while the example you show includes … Sometimes the spaces get url encoded to the + sign, and some other times to %20. 20 (unable to get local issuer certificate) asked 13 years, modified 1 year, viewed 391k times · i am interested in knowing why %20 is used as a space in urls, particularly why %20 was used and why we even need it in the first place. For example, %20 is the percent-encoding for the binary … · openssl verify return code: · as the aforementioned rfc does not include any reference of encoding spaces as +, i guess using %20 is the way to go today. Since its not mentioned anywhere in the … The % character is encoded as %25. · i want to make a string into a url using c#. They are indeed fools. 1-ⅰ、2-ⅱ、3-ⅲ、4-ⅳ、5-ⅴ、6-ⅵ、7-ⅶ、8-ⅷ、9-ⅸ。 10-ⅹ、11-ⅺ、12-ⅻ、13-xiii、14-xiv、15-xv、16-xvi、17-xvii、18-xviii、19-xix、20-xx。 罗马数字 的基本字符为:i、v … There must be something in the. net framework that should help, right? The way you get %2520 is when your …