Using SqlCommand , how to add multiple parameters to its object , insertion via winform in sql table
INSERT INTO item (c1,c2,c3...,c10) values (@a,@b....@j)

cmd.Parameters.Add("@a",SqlDbType.Varchar)
cmd.Parameteres["@a"].Value=textbox1.Text;

cmd.Parameters.Add("@b",SqlDbType.Varchar)
cmd.Parameteres["@b"].Value=textbox2.Text;.
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cmd.Parameters.Add("@j",SqlDbType.Varchar)
cmd.Parameteres["@j"].Value=textbox10.Text;

INSERT INTO item (c1) values (@a)
cmd.Parameters.Add("@a",SqlDbType.Varchar)
cmd.Parameteres["@a"].Value=textbox1.Text;

INSERT INTO item (c2) values (@b)
cmd.Parameters.Add("@b",SqlDbType.Varchar)
cmd.Parameteres["@b"].Value=textbox2.Text;.
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INSERT INTO item (c10) values (@j)
cmd.Parameters.Add("@j",SqlDbType.Varchar)
cmd.Parameteres["@j"].Value=textbox10.Text;

public static class DbCommandExtensions
{
    public static void AddInputParameters<T>(this IDbCommand cmd,
        T parameters) where T : class
    {
        foreach (var prop in parameters.GetType().GetProperties())
        {
            object val = prop.GetValue(parameters, null);
            var p = cmd.CreateParameter();
            p.ParameterName = prop.Name;
            p.Value = val ?? DBNull.Value;
            cmd.Parameters.Add(p);
        }
    }
}

cmd.AddInputParameters(new { a = textBox1.Text, b = TextBox2.Text, /* etc */ });

cmd.Parameters.AddWithValue("@j",textbox10.Text);
cmd.Parameters.AddWithValue("@k",textbox11.Text);
cmd.Parameters.AddWithValue("@l",textbox12.Text);

void AddParams(DBCommand cmd,params object[] parameters)
{
    if (parameters != null)
    {
        int index = 0;
        while (index < parameters.Length)
        {
            cmd.Parameters.AddWithValue("@"+(string)parameters[index], parameters[index + 1]);
            index += 2;
        }
    }
}

AddParams(a,"test1",b,3,c,DateTime.Now);