C# Static Class Extensions

HTTPExtensions.cs

/// This is a repistory of many differen extensions I use throughout multiple projects. 
/// A location here for ultimate move to other named extensions.
public static class HTTPExtensions
{

    /// <summary>
    /// Allow one to build a URL from its parts, similar to Path.Combine.
    /// </summary>
    /// <remarks>HMTL Extensions</Remarks>
    /// <param name="baseUrl">Initial bitof the url</param>
    /// <param name="segments">Each inidividual segment to join.</param>
    /// <returns>The full Url with slashes.</returns>
    public static string UrlCombine(this string baseUrl, params string[] segments)
        => string.Join("/", new[] { baseUrl.TrimEnd('/') }.Concat(segments.Select(s => s.Trim('/'))));

}

MicrosoftGraphExtensions.cs

public static class MicrosoftGraphExtensions
{
	/// <summary>
	/// Provide string data if it exists at target key/value.
	/// </summary>
	/// <remarks>Microsoft Graph Extensions</remarks>
	/// <param name="dictionary">Data dictionary</param>
	/// <param name="key">Key of value to extract</param>
	/// <returns>String of the value if key exists.</returns>
	public static string? SetAsStringIfExists(this IDictionary<string, object> dictionary, string key)
		=> dictionary.ContainsKey(key) ? dictionary[key]?.ToString() : null;


	/// <summary>
	/// Generate a Sharepont shared link with the url provided.
	/// </summary>
	/// <remarks>Microsoft Graph Extensions</remarks>/// 
	/// <param name="url">Valid url</param>
	/// <returns>Sharepont shared code url item.</returns>
	public static string ToDirectSharedCode(this string url)
	{
		if (string.IsNullOrEmpty(url))
			return string.Empty;

		string sharingUrl = url;
		string base64Value = System.Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(sharingUrl));
		string encodedUrl = "u!" + base64Value.TrimEnd('=').Replace('/', '_').Replace('+', '-');

		return encodedUrl;
	}

}