How to Resolve HTTP Basic Authentication Errors with HttpWebRequest?

Resolving HTTP Basic Authentication Issues Using HttpWebRequest

Using HttpWebRequest with HTTP Basic Authentication can sometimes lead to connection errors during the send process. This problem is often solved by manually setting the Authorization header in your HTTP request.

The header should be named "Authorization" and contain the value "Basic BASE64({USERNAME:PASSWORD})". The following code example shows how to implement this correctly:

<code class="language-csharp">string username = "abc";
string password = "123";
string encoded = Convert.ToBase64String(Encoding.GetEncoding("ISO-8859-1").GetBytes($"{username}:{password}"));
httpWebRequest.Headers.Add("Authorization", $"Basic {encoded}");</code>

It's important to note the use of Encoding.GetEncoding("ISO-8859-1"). Using this encoding instead of UTF-8 can prevent encoding-related errors.

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