Compiler Error Message: CS1501: No overload for method ToString takes 1 arguments in ASP.Net

Refer the below code.

string pTotal = (ddlQuantity.NamingContainer.FindControl("LblPriceT") as Label).Text.Trim();
decimal value = Convert.ToDecimal("100,00.00");
string priceTotal = value.ToString("N0", CultureInfo.InvariantCulture);

nedash says:

string pTotal = (ddlQuantity.NamingContainer.FindControl("LblPriceT") as Label).Text.Trim();

       decimal value = Convert.ToDecimal("LblPriceT");

       string priceTotal = value.ToString("N0", CultureInfo.InvariantCulture);

       //Label priceTotal = ddlQuantity.NamingContainer.FindControl("LblPriceT") as Label;

       priceTotal.Text = (Convert.ToDouble(quantity.Text) * Convert.ToDouble(price.Text.Trim())).ToString("N");

Change your code with below.

string pTotal = (ddlQuantity.NamingContainer.FindControl("LblPriceT") as Label).Text.Trim();
decimal value = Convert.ToDecimal(pTotal);
string priTotal = value.ToString("N0", CultureInfo.InvariantCulture);
(ddlQuantity.NamingContainer.FindControl("priceTotal") as Label).Text = (Convert.ToDouble(quantity.Text) * Convert.ToDouble(price.Text.Trim())).ToString("N");