How to change emission color programmatically in unity?

Question

Unity

How to programmatically change the emission color of a standard shader in unity? tried like this:

GetComponent().material.globalIlluminationFlags = MaterialGlobalIlluminationFlags.RealtimeEmissive;
GetComponent().material.SetVector("_EmissionColor", new Vector4(0.3f, 0.9f, 1f, 1f));

Interestingly, the parameters are applied, but when you manually expand the shader parameters in the inspector with the mouse during the game. What is the problem?