Hello Team,
Please I developed C# window Application with sqlserver management studio 18 and after deploying the application and I tried to install it on the user computer and this error came, A network - related or instance-specific error occured while establishing a connection to sql server. The server was not found or was not accessible. Verify that the instance name is correct and that sqlserver is configured to allow remote connection. (provider Sql Network interfaces, error; 26 -Error Locating Server/Instance Specified)