Question

Why I get error when used struct array in struct?

public struct Tables
{
    public string name;
}

public struct Schema
{
    public string name;
    public Tables[] tables; //Declarate struct array in struct
}

I used struct with this code:

Schema schema;

private void Form1_Load(object sender, EventArgs e)
{
    schema.name = "schemaName";
    schema.tables[0].name = "tables1Name"; // Error in here: Object reference not set to an instance of an object
}

Answer 1

You need to initialize your array:

schema.name = "schemaName";
schema.tables = new Tables[10];
schema.tables[0].name = "tables1";