SQL Server custom function, custom stored procedure

sqlserverprogramming.cs

using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;

namespace SqlServerProject5
{
    public class Class1
    {
        [SqlFunction]
        public static SqlInt32 GetSquare(SqlInt32 param)
        {
            return param * param;
        }

        [SqlProcedure]
        public static void InsertUser(SqlString name, SqlInt32 score)
        {
            string insertQuery = "INSERT INTO myUser(user_name, user_score) VALUES(@name, @score)";
            using (SqlConnection conn = new SqlConnection(@"context connection=true"))
            {
                conn.Open();
                using (SqlCommand cmd = new SqlCommand(insertQuery, conn))
                {
                    cmd.Parameters.Add("@name", System.Data.SqlDbType.VarChar, 50);
                    cmd.Parameters.Add("@score", System.Data.SqlDbType.Int);
                    cmd.Parameters[0].Value = name;
                    cmd.Parameters[1].Value = score;
                    cmd.ExecuteNonQuery();
                }
            }
        }
    }
}