c# extract values from key-value pairs in string

i have a string like this: ``` blablablamorecontentblablabla?name=michel&score=5&age=28&iliedabouttheage=true ``` looks like a regular query string yes, but i'm not in any web context now i want to extract the values (after the = sign) by their key , for example,what is the name (michel), the score(5), the age(28) etc. Normally i parse the string like get the position in the string of the word 'name', then add 5 to it (length of 'name=') and name this position 'start' then search for the &-sign and name that position 'end', and then get the string between the position start and end. But there must be a better solution, is this a regex thing?