How to combine URLs/URIs in C#

February 03, 2014 C# Snippet
The file system have the Path.Combine method to combine paths but how to combine a base URL with an absolute or relative URL/URI?

The answer is to use the System.Uri-constructor to combine the URL:

public static Uri CombineUri(string baseUri, string relativeOrAbsoluteUri) {
    return new Uri(new Uri(baseUri), relativeOrAbsoluteUri);
}

public static string CombineUriToString(string baseUri, string relativeOrAbsoluteUri) {
    return new Uri(new Uri(baseUri), relativeOrAbsoluteUri).ToString();
}

..

// Results in "http://www.my.domain/relative/path"
var a = CombineUriToString("http://www.my.domain/", "relative/path");

// Results in "http://www.my.domain/absolute/path"
var b = CombineUriToString("http://www.my.domain/something/other", "/absolute/path");

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