Insert()

string System.String.Insert ( int startIndex, string value )

inline

Definition at line 1958 of file String.cs.

    {
        if ((object)value == null)
        {
            throw new ArgumentNullException("value");
        }
        if ((uint)startIndex > Length)
        {
            throw new ArgumentOutOfRangeException("startIndex");
        }
        int length = Length;
        int length2 = value.Length;
        if (length == 0)
        {
            return value;
        }
        if (length2 == 0)
        {
            return this;
        }
        int length3 = length + length2;
        string text = FastAllocateString(length3);
        Buffer.Memmove(ref text._firstChar, ref _firstChar, (nuint)startIndex);
        Buffer.Memmove(ref Unsafe.Add(ref text._firstChar, startIndex), ref value._firstChar, (nuint)length2);
        Buffer.Memmove(ref Unsafe.Add(ref text._firstChar, startIndex + length2), ref Unsafe.Add(ref _firstChar, startIndex), (nuint)(length - startIndex));
        return text;
    }

References System.String._firstChar, System.String.FastAllocateString(), System.length, System.String.Length, System.length2, System.length3, System.Buffer.Memmove(), System.startIndex, System.text, and System.value.