How to Efficiently Build Query Strings for System.Net.HttpClient GET Requests?

Crafting Query Strings for System.Net.HttpClient GET Requests

System.Net.HttpClient's GET requests lack a direct parameter-adding method, but constructing query strings is straightforward. Here are two efficient approaches:

First, leverage HttpUtility.ParseQueryString to avoid manual name-value pair construction:

var query = HttpUtility.ParseQueryString(string.Empty);
query["foo"] = "bar&-baz";
query["bar"] = "bazinga";
string queryString = query.ToString();

This produces:

<code>foo=bar%3c%3e%26-baz&bar=bazinga</code>

Alternatively, use the UriBuilder class for complete URI customization:

var builder = new UriBuilder("http://example.com");
builder.Port = -1;
var query = HttpUtility.ParseQueryString(builder.Query);
query["foo"] = "bar&-baz";
query["bar"] = "bazinga";
builder.Query = query.ToString();
string url = builder.ToString();

Resulting in:

<code>http://example.com/?foo=bar%3c%3e%26-baz&bar=bazinga</code>

Both HttpUtility.ParseQueryString and UriBuilder offer clean, efficient solutions for building query strings within System.Net.HttpClient GET requests.

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