Applying the key

Call this once at application startup, before creating any control.

using unvell.ReoGrid.Core.License;

ReoGridLicense.SetLicense("eyJsaWNlbnNlZSI6...");

If the key is malformed, the Base64 is corrupt, or the signature does not match, an ArgumentException is thrown. The signature is always verified before the contents are trusted — the order is fixed, so keys cannot be forged.

Rather than embedding the key in source code, we recommend reading it from a configuration file or an environment variable.

var key = Environment.GetEnvironmentVariable("REOGRID_LICENSE");
if (!string.IsNullOrEmpty(key))
	ReoGridLicense.SetLicense(key);

One key covers everything

Keeps working after your updates expire

ReoGrid One is a perpetual license at initial purchase, plus an optional annual renewal (the same model as DevExpress and Telerik).

Even if you skip the annual renewal, the binaries you already have keep working with no time limit. There is no kill switch — no mechanism that stops the product on a deadline. The updates expiry can be read as LicenseInfo.UpdatesUntil, but it is not used in license validation. The only thing that changes when your updates expire is whether you can obtain new builds, and that is controlled on the distribution side — the portal and NuGet.

An application you have already shipped will never stop working because the updates period ended.

Behavior without a key

The design does not get in the way of evaluation.

Printing is left open because PDF export works in the same state — blocking it would only leave a bypass route.

Checking the status

if (!ReoGridLicense.IsLicensed)
{
	// 未適用・キーが不正・トライアル期限切れのいずれか
}

var info = ReoGridLicense.Current;
if (info != null)
{
	Console.WriteLine(info.Licensee);      // 使用許諾先
	Console.WriteLine(info.Tier);          // Trial / Production
	Console.WriteLine(info.ExpiresAt);     // トライアル期限（製品版は null＝無期限）
	Console.WriteLine(info.UpdatesUntil);  // 更新権の期限（判定には使われない）
}

Only three things factor into IsLicensed: the signature, ExpiresAt (the trial expiry) and AllowedAssembly (when the key is bound to an assembly).

Main members of LicenseInfo

The license cannot be removed at runtime

There is no way to revoke a license once applied while the application is running. An internal API exists for testing, but it is not public.

Read next

• Installation
• What is ReoGrid One