可以在ADO.NET中删除数据库或创建新数据库

using System.Data.SqlClient;

string connectionString = "Data Source=localhost;Initial Catalog=master;Integrated Security=True";
string databaseName = "MyDatabase";

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();
    using (SqlCommand command = new SqlCommand($"DROP DATABASE {databaseName}", connection))
    {
        command.ExecuteNonQuery();
    }
}

using System.Data.SqlClient;

string connectionString = "Data Source=localhost;Initial Catalog=master;Integrated Security=True";
string databaseName = "MyDatabase";

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();
    using (SqlCommand command = new SqlCommand($"CREATE DATABASE {databaseName}", connection))
    {
        command.ExecuteNonQuery();
    }
}