public void InviteUserInProject(int senderId, int projectId, int receiverId)
{
var invitations = this.GetAllInvitationsToProject(projectId);
if (invitations.Any(oneInvitation => oneInvitation.ReceiverId == receiverId && oneInvitation.ProjectId == projectId))
{
//return;
}
var invitation = new Invitation
{
ReceiverId = receiverId,
SenderId = senderId,
ProjectId = projectId,
IsInvitationConfirmed = false
};
this.projectRepository.AddInvitation(invitation);
}