How to get enum value from enum property in C#

public class Class1
    {
        public Class1();
	public ActivityEnum ActivityId { get; set; }
        public SourceSystemEnum SourceId { get; set; }
      
    }

  public enum ActivityEnum
    {
        Create = 1,
        Delete = 2,
        Update = 3,
    }
public enum SourceSystemEnum
    {
       ProvisioningService,= 1
    }
Class1 logActivity = new Class1
{
	ActivityId = ActivityEnum.Delete,
        SourceSystemId = SourceSystemEnum.ProvisioningService,
                       
};

Class1 logActivity = new Class1
{
	ActivityId = ActivityEnum.Delete,
        SourceSystemId = SourceSystemEnum.ProvisioningService,
                       
}